David Huang! AP Biology! Oct. 4,2013! AP Biology Osmosis Laboratory Analysis! Introduction:!! There are several different methods for the
|
|
- Gordon Franklin
- 6 years ago
- Views:
Transcription
1 David Huang AP Biology Oct. 4,2013 AP Biology Osmosis Laboratory Analysis Introduction: There are several different methods for the transportation of molecules across the phospholipid bilayer. These transportation methods can either be downhill, which requires no input of energy (in the form of ATP and other metabolic energies), or uphill, which requires the input of energy. In this particular lab, we will examine the former type of transport. Osmosis and diffusion, although both are downhill transports, bear some minute differences. Both of these types of transports travel down the electrochemical gradient meaning they do not require energy. However, osmosis occurs when there is a pressure difference, while diffusion occurs when there is a concentration difference of a solvent (usually water). In osmosis, the difference in pressure, or osmotic pressure, is caused by the difference in solute concentration. Both of these types of transport are important to the biological processes of organisms. The alveoli in our lungs is dependent on the diffusion of gasses. When there is a high concentration of oxygen and low concentration of carbon dioxide in the alveoli and a high concentration of carbon dioxide and low concentration of oxygen in the capillaries, diffusion starts to occur. The oxygen from the higher concentration will begin to diffuse into the capillaries while the carbon dioxide is diffused out. Water potential, expressed as, is the potential of water to diffuse from one area to another. can only be either zero or negative, with pure water being zero and any other solvents being negative. The more negative a solvent is the lower the is. Our experiment with the potatoes is an example of this. When the potato cube is submerged in the deionized water it gained mass because the potato itself had a lower water potential than the deionized water, thus in an attempt to reach equilibrium the deionized water will osmose into the potato. Similarly, if the potato is placed into a solution that has a lower water potential than it does, the potato will lose mass. An example of this would be the solutions in the experiment that had 0.6m or higher concentration of sucrose (there is a higher concentration of solutes in the solution and a lower concentration of water thus causing water to osmose out of the potato). Procedures: (Exercise 1) After all the materials needed for the lab are gathered, the grams of sucrose that are to be dissolved into the deionized water must be calculated. The following is an example of the calculations, if the desired molarity of sucrose was 0.2M, the calculation would be 0.02 moles of sucrose * 342.3= 6.8g which would mean 6.8 grams of sucrose must be added into the solvent. To clarify, the 0.2M of sucrose equals to 0.02moles per 1 liter of water and the is the molecular mass. For the 0.4M solution it would be changed from 0.02 moles of sucrose to 0.04, these changes must also applied to the other respective solutions. After the sucrose solutions have been made, 10ml. of each solution (including plain deionized water) are added to the dialysis bags. When the dialysis bags are rinsed and dried, they are weighed and the weight recorded. Then all of the dialysis bags are immersed in separate beakers containing 250ml of distilled water. After the bags have rested for minutes, they are taken out and dried. The bags must then be weighed and recorded. (The percent change in mass can be found through the follow equation: [(final mass - initial mass)/ initial mass]*100.
2 (Exercise 2) The left over solutions from the first exercise are poured into their own respective labeled beakers. A potato is sliced into 6 equal cubes and are weighed as well as recorded. These potato cubes are then put into the beakers containing the sucrose solutions. After one day of submerging the potatoes in the solution, they are taken out, dried, and weighed. The mass difference is calculated as well as the percent change in mass using the given equation: [(final mass - initial mass)/ initial mass]*100. Analysis Questions: 1. Explain the relationship between the change in mass and the molarity of sucrose within the dialysis bag. As the molarity of sucrose increases in the dialysis bags( e.g. from 0.2M to 0.4M), so will the mass difference. Since the concentration of sucrose is higher and the water concentration is lower than the solution it is immersed in, the water will diffuse into the dialysis bag, in an attempt to reach equilibrium. 2. Predict what would happen to the mass of each bag in this experiment if all the bags were placed in 0.4M sucrose solution instead of distilled water. Explain your response. The bag filled with the distilled water will decrease in mass as will the dialysis bag with 0.2M of sucrose. The decrease in mass is due to the concentration of the solutes being higher in the solution outside of the dialysis bag, which will cause water to flow out. The dialysis bag filled with 0.4M sucrose solution will see very little change as the concentration of solutes are the same in and out of the dialysis bag (the solution is isotonic in terms of the dialysis bag). Any of the bags containing a sucrose solution of 0.4M or higher will see a increase in mass due to the solutes inside the dialysis bag is higher than that of the outside (this will cause water to flow into the bag). 3.Why did you calculate the percent change in mass rather than simply using the change in mass? Calculating the percent change is more accurate when we are looking for a cross comparison between multiple sets of data. Finding the mass difference is only relevant for sets of data that started with the same mass. In our experiment, however, all of our dialysis bags had different masses in the beginning. If we found the mass difference it would have little use to us since it s not relative to these sets of data (which had different starting masses). 4. A dialysis bag is filled with distilled water and then placed in a sucrose solution. The bag s initial mass is 20g, and its final mass is 18g. Calculate the percent change of mass, showing your calculations.
3 Tables and Graphs for Exercise 1 (Osmosis Lab): Contents in Bag Initial Final Difference % Change in Class Average Distilled Water 10.56g 10.58g 0.02g M 10.02g 11.03g 1.01g M 10.47g 12.52g 2.05g M 10.82g 12.01g 1.19g M 10.91g 12.37g 1.46g M 10.92g 13.13g 2.21g Osmosis as Observed in Sucrose-filled Dialysis bags 22.5 % Change in M 0.2M 0.4M 0.6M 0.8M 1.0M Sucrose Molarity Individual Results Class Average
4 Tables and Graphs for Exercise 2: Water Potential of Potato Cells Contents in Beaker Initial Final Difference Distilled Water 1.20g 1.29g 0.09g 7.5% % Change in 0.2M 1.08g 1.21g 0.13g 12.04% 0.4M 1.60g 1.68g 0.08g 5% 0.6M 1.23g 1.05g -0.18g % 0.8M 1.51g 1.24g % 1.0M 1.15g 0.8g % 20 Water Potential as Observed in Potato Cells % Increase/Decrease in M 0.2M 0.4M 0.6M 0.8M 1.0M Sucrose Molarity Individual Data
5 Conclusions: Although the most of the steps were followed correctly, there was one mistake that should be addressed, which was leaving the dialysis bags in the solutions over night. However, this did not seem to cause any errors in the experiment as the results corresponded with the theoretical results; that is, the results hypothesized using previously known ideas such the results of cells being immersed in hypotonic solutions, isotonic solutions, and hypertonic solutions. Our experiment, Exercise 1, reflects the theoretical results as the dialysis bags filled with 0.2M, 0.4M, 0.6M, 0.8M, and 1.0M sucrose gained mass while the bag filled with distilled water had relatively little change. The only deviating result, when compared to the class, that we had was the distilled water dialysis bag. However, I suspect this is due to, mainly, human error but it could also be due to the fact that water is constantly flowing in and out of the dialysis bag to keep equilibrium. The results for exercise 2 were mostly accurate except the for the potato submerged in distilled water. This potato only gained a mass of 7.5% which, in theory, should be higher than the 12.04% of the potato submerged in the 0.2M sucrose solution. Distilled water, which has less solutes than the 0.2M sucrose solution, should have made the potato gain much more weight as the difference in solutes is higher. Aside from this unexpected result, the other samples appeared to be quite persistent with the intended results.
LAB 04 Diffusion and Osmosis
LAB 04 Diffusion and Osmosis Objectives: Describe the physical mechanisms of diffusion and osmosis. Understand the relationship between surface area and rate of diffusion. Describe how molar concentration
More information1. How many fatty acid molecules combine with a glycerol to form a phospholipid molecule? A. 1 B. 2 C. 3 D. 4
Topic 3: Movement of substances across cell membrane 1. How many fatty acid molecules combine with a glycerol to form a phospholipid molecule? A. 1 B. 2 C. 3 D. 4 Directions: Questions 2 and 3 refer to
More informationName: Bio A.P. Lab Diffusion & Osmosis
Name: Bio A.P. Lab Diffusion & Osmosis BACKGROUND: Many aspects of the life of a cell depend on the fact that atoms and molecules are constantly in motion (kinetic energy). This kinetic energy results
More informationDiffusion and Osmosis
Diffusion and Osmosis Introduction: In this exercise you will measure diffusion of small molecules through dialysis tubing, an example of a semi permeable membrane. The movement of a solute through a semi
More informationMultiple Choice Review- Membranes & Enzymes
Multiple Choice Review- Membranes & Enzymes 1. Cell membranes are and regulate the materials moving into and out of the cell, in order to maintain equilibrium. a. completely permeable b. ionically permeable
More informationDIFFUSON AND OSMOSIS INTRODUCTION diffusion concentration gradient. net osmosis water potential active transport
DIFFUSON AND OSMOSIS NAME DATE INTRODUCTION The life of a cell is dependent on efficiently moving material into and out of the cell across the cell membrane. Raw materials such as oxygen and sugars needed
More informationDiffusion and Osmosis Lab AP LAB 4
Diffusion and Osmosis Lab AP LAB 4 Part 1: Surface Area and Cell Size Which do you think has a greater influence on the rate of diffusion in a cell surface area or volume? You will calculate surface are-to-volume
More informationOsmosis and Diffusion: How biological membranes are important This page is a lab preparation guide for instructors.
Osmosis and Diffusion: How biological membranes are important This page is a lab preparation guide for instructors. **All solutions and dialysis bags can easily be prepared prior to lab start to maximize
More informationThe Role of the Cell Membrane in Transport
The Role of the Cell Membrane in Transport diffusion: the spontaneous movement of particles from an area of higher concentration to an area of lower concentration Many people, young and old, enjoy a nice
More informationAP Biology Lab 1c Water Potential
Page 1 of 9 AP Biology Lab 1c Water Potential In this part of the exercise you will use potato cores placed in different molar concentrations of sucrose in order to determine the water potential of potato
More informationTopic 3: Movement of substances across cell membrane
Topic 3: Movement of substances across cell membrane 1. What is/are the role(s) of structure A? (1) For cell recognition. (2) For carrying water-soluble substances across cell membrane. (3) For supporting
More informationAP Lab Four: Water Potential and Osmosis
AP Biology AP Lab Four: Water Potential and Osmosis Name Atoms and molecules are constantly in motion, bumping off of membranes, barriers, each other, without end. The results of this among other phenomena
More informationEXERCISE Transport Mechanisms in the Body
EXERCISE Transport Mechanisms in the Body 2 OBJECTIVES After completing these activities, you should be able to: Understand the differences between passive and active processes of transport Define diffusion,
More informationBiology. Membranes.
1 Biology Membranes 2015 10 28 www.njctl.org 2 Vocabulary active transport carrier protein channel protein concentration gradient diffusion enzymatic activity facilitated diffusion fluid mosaic hypertonic
More informationMembranes & Enzymes. Practice Questions. Slide 1 / 91. Slide 2 / 91. Slide 3 / 91
New Jersey Center for Teaching and Learning Slide 1 / 91 Progressive Science Initiative This material is made freely available at www.njctl.org and is intended for the non-commercial use of students and
More informationDiffusion and Osmosis
Diffusion and Osmosis During your first year of residency at Mountainside Hospital, you are treating a group of patients that exhibit signs of dehydration. You have to be sure to take note of all the solutes
More informationInvestigation 4: Diffusion and Osmosis Notes From the teacher
Day 1: Investigation 4: Diffusion and Osmosis Notes From the teacher Before class: Read Learning Objectives through Procedure 1 and complete Day 1 Pre Lab. Pre-Lab: 1. What is diffusion? 2. What is kinetic
More informationLab #2: Osmosis Pre-Lab Exercise
Lab #2: Osmosis Pre-Lab Exercise Name 1. Using your own words, define the following terms: a. Osmosis b. Concentration gradient: c. Hypertonic solution: d. Isotonic solution: e. Hypotonic solution: 2.
More informationLab 4: Osmosis and Diffusion
Page 4.1 Lab 4: Osmosis and Diffusion Cells need to obtain water and other particles from the fluids that surround them. Water and other particles also move out of cells. Osmosis (for water) and diffusion
More informationLAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE
LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE NAME: PERIOD: DATE: Building Background Knowledge: 1) SELECTIVELY PERMEABLE MEMBRANE: Every cell is surrounded by a selectively permeable membrane
More informationBig. Cellular Processes: Idea. Energy and Communication DIFFUSION AND OSMOSIS. What causes my plants to wilt if I forget to water them?
Big Cellular Processes: Idea 2 Energy and Communication INVESTIGATION 4 DIFFUSION AND OSMOSIS What causes my plants to wilt if I forget to water them? BACKGROUND Cells must move materials through membranes
More informationLAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE
LAB: DIFFUSION ACROSS A SELECTIVELY PERMEABLE MEMBRANE NAME: PERIOD: DATE: Building Background Knowledge: 1) SELECTIVELY PERMEABLE MEMBRANE: Every cell is surrounded by a selectively permeable membrane
More informationBiology. Slide 1 / 74. Slide 2 / 74. Slide 3 / 74. Membranes. Vocabulary
Slide 1 / 74 Slide 2 / 74 iology Membranes 2015-10-28 www.njctl.org Vocabulary Slide 3 / 74 active transport carrier protein channel protein concentration gradient diffusion enzymatic activity facilitated
More informationBiology Movement Across the Cell Membrane
Biology 160 - Movement Across the Cell Membrane Prelab Information Movement is one of the characteristics of life. The ability to control the movement of material across the cell membrane is an incredibly
More informationResearch Experiences for Teachers (RET) 2012 LESSON PLAN TEMPLATE
LESSON PLAN TEMPLATE MODULE TOPIC: Inquiry based learning- Osmosis and Diffusion The acquisition of biochemical and life sustaining compounds is a major theme in life science. This lesson provides students
More informationBiology Movement across the Cell Membrane
Biology 160 - Movement across the Cell Membrane Prelab Information Movement is one of the characteristics of life. The ability to control the movement of material across the cell membrane is an incredibly
More informationCellular Transport Worksheet
Cellular Transport Worksheet Name Section A: Cell Membrane Structure 1. Label the cell membrane diagram. You ll need to draw lines to some of the structures. **Draw cholesterol molecules in the membrane.**
More informationReview: Cellular Transport
Review: Cellular Transport OSMOSIS 1. Label the pictures below ( isotonic, hypertonic, or hypotonic). The dots represent solutes. A. B. C. 2. means there is a GREATER concentration of solute molecules
More informationTo understand osmosis, we must focus on the behavior of the solvent, not the solute.
GCC CHM 130LL Osmosis and Dialysis Purpose: The purpose of this experiment is to observe the closely related phenomena of osmosis and diffusion as it relates to dialysis. It is hoped that you will be able
More informationDiffusion, Osmosis and Active Transport
Diffusion, Osmosis and Active Transport Part A: Diffusion A living cell interacts constantly with the environmental medium that surrounds it. The plasma membrane surrounding a cell is a living, selectively
More informationCELL MEMBRANE & CELL TRANSPORT (PASSIVE and ACTIVE) Webquest
Name: Period: CELL MEMBRANE & CELL TRANSPORT (PASSIVE and ACTIVE) Webquest PART I: CELL MEMBRANES WEBSITE #1: http://www.wisc-online.com/objects/index_tj.asp?objid=ap1101 1. What is the BASIC UNIT of LIFE?
More informationContents. Module A Cells and Cell Processes. Module B Continuity and Unity Of Life. Introduction to Keystone Finish Line Biology...
Contents Introduction to Keystone Finish Line Biology...5 Module A Cells and Cell Processes Unit 1 Basic Biological Principles...7 Lesson 1 Unifying Characteristics of Life BIO.A.1.1.1, BIO.A.1.2.1...8
More informationThe Cell Membrane. Also known as the Plasma Membrane
Student Objectives Know the different parts of the cell membrane Understand the role of the cell membrane in cellular transport Understand diffusion and osmosis Determine what will happen to plant and
More informationBIOLOGY 1101 LAB 1: OSMOSIS & DIFFUSION. READING: Please read pages & in your text prior to lab.
BIOLOGY 1101 LAB 1: OSMOSIS & DIFFUSION READING: Please read pages 27-31 & 83-86 in your text prior to lab. INTRODUCTION: All living things depend on water. A water molecule is made up of an oxygen atom
More informationPrinciples & Practice of Diffusion & Osmosis. Storage: Store entire experiment at room temperature. EXPERIMENT OBJECTIVE
The Biotechnology Education Company Storage: Store entire experiment at room temperature. 281 EDVO-Kit # Principles & Practice of Diffusion & Osmosis EXPERIMENT OBJECTIVE The objective of this experiment
More informationBIOL 305L Spring 2019 Laboratory Six
Please print Full name clearly: BIOL 305L Spring 2019 Laboratory Six Osmosis in potato and carrot samples Introduction Osmosis is the movement of water molecules through a selectively permeable membrane
More information1. All cells have a that acts as a between the outside and inside of the cell.
https://www.youtube.com/watch?v=cnbzdcibegy 1. All cells have a that acts as a between the outside and inside of the cell. 1 2. Cell membranes are primarily made of which are large molecules. 3. It is
More information3.2.3 Transport across cell membranes
alevelbiology.co.uk 3.2.3 Transport across cell membranes SPECIFICATION The basic structure of all cell membranes, including cell-surface membranes and the membranes around the cell organelles of eukaryotes,
More information5.6 Diffusion, Membranes, and Metabolism
5.6 Diffusion, Membranes, and Metabolism Concentration of a substance Number of atoms or molecules in a given volume Concentration gradient of a substance A difference in concentration between two regions
More informationMovement of substances across the cell membrane
Ch 4 Movement of substances across the cell membrane Think about (Ch 4, p.2) 1. The structure of the cell membrane can be explained by the fluid mosaic model. It describes that the cell membrane is mainly
More informationCh 3 Membrane Transports
Ch 3 Membrane Transports what's so dynamic about cell membranes? living things get nutrients and energy from the envrionment this is true of the entire organism and each cell this requires transport in/out
More informationCELL BOUNDARIES. Cells create boundaries through: Cell Membranes made of the phospholipid bilayer Cell Walls made of cellulose in plants
CELL BOUNDARIES CELL BOUNDARIES Cells create boundaries through: Cell Membranes made of the phospholipid bilayer Cell Walls made of cellulose in plants TYPES OF MEMBRANES Some substances = too large or
More informationINVESTIGATION : Determining Osmolarity of Plant Tissue
INVESTIGATION : Determining Osmolarity of Plant Tissue AP Biology This lab investigation has two main components. In the first component, you will learn about the osmolarity of plant tissues and the property
More informationLAB 4: OSMOSIS AND DIFFUSION
Page 4.1 LAB 4: OSMOSIS AND DIFFUSION Cells need to obtain water and other particles from the fluids that surround them. Water and other particles also move out of cells. Osmosis (for water) and diffusion
More informationPOLAR COVALENT BOND 1 P
POLAR COVALENT BOND 1 P HP OXYGEN HIGHER ELECTRO- O WATER MOLECULE HYDROGEN LOWER ELECTRO- H BOND BOND H ELECTRO- = 3.5 ELECTRO- = 2.1 ELECTRO- = 2.1 = E- POLAR COVALENT BOND +/- - 1 P? CHARGE OXYGEN HIGHER
More informationPassive Cellular Transport. Unit 2 Lesson 4
Unit 2 Lesson 4 Students will be able to: Define passive transport Enumerate the three types of passive transport Described each type of passive transport: osmosis, diffusion, and facilitated diffusion
More informationConstant Motion of Molecules. Kinetic Theory of Matter Molecules move randomly and bump into each other and other barriers
CELL TRANSPORT Constant Motion of Molecules Kinetic Theory of Matter Molecules move randomly and bump into each other and other barriers Solution homogenous liquid throughout which two or more substances
More informationINTERNATIONAL TURKISH HOPE SCHOOL ACADEMIC YEAR CHITTAGONG SENIOR SECTION BIOLOGY HANDOUT OSMOSIS, DIFFUSION AND ACTIVE TRANSPORT CLASS 9
INTERNATIONAL TURKISH HOPE SCHOOL 2014 2015 ACADEMIC YEAR CHITTAGONG SENIOR SECTION BIOLOGY HANDOUT OSMOSIS, DIFFUSION AND ACTIVE TRANSPORT CLASS 9 Name :... Date:... d) Movement of substances into and
More informationCh3: Cellular Transport Review KEY
Ch3: Cellular Transport Review KEY OSMOSIS Label the pictures below ( isotonic, hypertonic, or hypotonic environments) hypotonic hypertonic isotonic hypertonic means there is a GREATER concentration of
More informationCell Membrane (Transport) Notes
Cell Membrane (Transport) Notes Cell Membrane and Cell Wall: ALL cells have a cell membrane made of proteins and lipids protein channel Cell Membrane Layer 1 Layer 2 lipid bilayer protein pump SOME cells
More informationLearning Outcomes. 2. Diffusion takes place through the cell membrane because it is selectively permeable.
Diffusion Learning Outcomes 1. Diffusion is the movement of molecules from a high concentration to a low concentration down a concentration gradient until evenly spread. 2. Diffusion takes place through
More informationPlasma Membrane Function
Plasma Membrane Function Cells have to maintain homeostasis, they do this by controlling what moves across their membranes Structure Double Layer of phospholipids Head (polar) hydrophiliclikes water -
More informationBIOL 347L Laboratory Three
Introduction BIOL 347L Laboratory Three Osmosis in potato and carrot samples Osmosis is the movement of water molecules through a selectively permeable membrane into a region of higher solute concentration,
More informationUnit 2 Warm Ups. Equilibrium
Unit 2 Warm Ups Equilibrium 1. Cell wall 2. Mitochondria 3. Chloroplast 4. Vesicle 5. Vacuole 6. Rough Endoplasmic Reticulum 7. Smooth Endoplasmic Reticulum 8. Cytoskeleton 9. Lysosomes 10.Cell Membrane
More informationBiology Unit 5 Cancer, Lab Activity 5-2
Biology Unit 5 Cancer, Lab Activity 5-2 The Plasma membrane serves as a barrier between the internal cell environment and the external world. The plasma membrane is a dynamic structure. It allows some
More informationDiffusion & Osmosis - Exercise 4
Diffusion & Osmosis - Exercise 4 Objectives -Define: Solvent, Solute, and Solution -Define: Diffusion, Selectively permeable membrane, Osmosis, and Dialysis -Understand rule of thumb: Concentration will
More informationCell Diffusion and Osmosis Lab: Directions
Cell Diffusion and Osmosis Lab: Directions Adapted from AP bio lab 4 http://media.collegeboard.com/digitalservices/pdf/ap/bio-manual/bio_lab4-diffusionandosmosis.pdf Please return Background: Most cells
More informationChapter 3.4 & 3.5 Cell Transport (Osmosis and Diffusion) = only some molecules can get in or out of the cell
Chapter 3.4 & 3.5 Cell Transport (Osmosis and Diffusion) I. Cell Membrane (cells need an inside and outside) a. separate cell from its environment b. cell membrane is the boundary c. cell membrane controls
More informationAgar Lab. Sophie, Regan, Libby
Agar Lab Sophie, Regan, Libby Agar Lab: Our Data Independent variable: Width of the agar Levels of IV Dependent variable: Time it takes for NaOH to diffuse (seconds) 2mm, 4mm, and 8mm # of trials 3 constants
More informationUNIT 6: Cell Membrane Transport Name: Essential Idea(s): Membranes control the composition of cells by active and passive transport
UNIT 6: Cell Membrane Transport Name: Essential Idea(s): Membranes control the composition of cells by active and passive transport IB Assessment Statements 1.1.U3 1.4.U1 1.4.S1 1.4.NOS 1.4.A2 1.4.U2 Cell
More informationDistilled Water Balance Ruler Plastic wrap
The following lab taken from: http://www.utsouthwestern.edu/edumedia/edufiles/education_training/programs/stars/osmosis-demo-lab.pdf Background Osmosis is the process whereby water moves across a cell
More informationMeasuring Osmotic Potential
Measuring Osmotic Potential INTRODUCTION All cells require essential materials to ensure their survival. Chemical, physical, and biological processes are used to move these materials inside of cells. Similar
More information1. Structure A is the a. Cell wall b. Cell membrane c. Vacuole d. Lysosome
Figure 1 Use Figure 1 to answer the following questions: 1. Structure A is the a. Cell wall b. Cell membrane c. Vacuole d. Lysosome 2. Structure E controls cellular functions. It is the a. Nucleolus b.
More information11/30/18 CELL TRANSPORT: POGIL
11/30/18 CELL TRANSPORT: POGIL DO NOW Study for quiz for 3 minutes AGENDA Quiz (15 min) Membrane Structure and Function POGIL Share out QUIZ You will have 15 minutes to complete the quiz When you are finished,
More informationMovement Through the Cell Membrane
Movement Through the Cell Membrane Cellular Movement All living organisms rely on diffusion Get oxygen for respiration Removing waste products Transpiration in plants Cellular Movement The cell membrane
More informationCell Structure and Function Practice Exam - KEY
Biology 12 Name: Cell Structure and Function Practice Exam - KEY Cell parts and Function 1. Identify each part of the cell indicated and give one role for each structure in the secretion and/or synthesis
More informationCELL TRANSPORT and THE PLASMA MEMBRANE. SB1d. Explain the impact of water on life processes (i.e., osmosis, diffusion).
CELL TRANSPORT and THE PLASMA MEMBRANE SB1d. Explain the impact of water on life processes (i.e., osmosis, diffusion). What if What would happen if an organism could not get energy or get rid of wastes?
More informationEquilibrium when two areas have the same concentration or are filled evenly
Aim: How does the cell membrane function to maintain homeostasis? Do Now: Describe what homeostasis is. Homework: Vocab: Homeostasis, equilibrium, concentration gradient, diffusion, carrier protein, osmosis,
More informationPlant Cells and Water Potential. Data Collecting and Processing
Carlos Rodriguez October 8 th, 2011 Mrs. Hays Biology Lab Plant Cells and Water Potential Data Collecting and Processing In the following lab our group investigated water potential by immersing potato
More informationSTATION 4: TONICITY due to OSMOSIS / Turgor Pressure in Plants
STATION 4: TONICITY due to OSMOSIS / Turgor Pressure in Plants Tonicity is the concentration of solutions that determines the direction water will move across a semi-permeable membrane. A solution is a
More informationIn groups of 3, half the class will conduct factors affecting diffusion lab while the others are working on osmosis
Factors Affecting Diffusion & Osmosis In groups of 3, half the class will conduct factors affecting diffusion lab while the others are working on osmosis 1 THE CELL IN ACTION! 2 Passive Transport The net
More informationCell Diffusion & Permeability: See-Through Eggs Student Advanced Version
Cell Diffusion & Permeability: See-Through Eggs Student Advanced Version In this lab, students will learn about the permeability of the cell membrane. By studying the ability of a shell-less egg to absorb
More informationCh. 7 Diffusion, Osmosis, and Movement across a Membrane
Ch. 7 Diffusion, Osmosis, and Movement across a Membrane Diffusion Spontaneous movement of particles from an area of high concentration to an area of low concentration Does not require energy (exergonic)
More informationThe Plasma Membrane - Gateway to the Cell
The Plasma Membrane - Gateway to the Cell 1 Photograph of a Cell Membrane 2 Cell Membrane The cell membrane is flexible and allows a unicellular organism to move 3 Homeostasis Balanced internal condition
More informationInvestigating Osmosis By Amy Dewees,Jenkintown.High School and Dr. Ingrid Waldron, Department of Biology, University of Pennsylvania, 20091
Investigating Osmosis By Amy Dewees,Jenkintown.High School and Dr. Ingrid Waldron, Department of Biology, University of Pennsylvania, 20091 What is diffusion? What does it mean to say that a membrane is
More informationConsider the structure of the plasma membrane (fig. 8.6)- phospholipid bilayer with peripheral and integral proteins.
Topic 8: MEMBRANE TRANSPORT (lectures 11-12) OBJECTIVES: 1. Have a basic appreciation of the chemical characteristics of substances that impact their ability to travel across plasma membranes. 2. Know
More informationIntroduction diffusion osmosis. imbibe Diffusion The Cell Membrane and Osmosis selectively permeable membrane Osmosis 1. Isotonic 2.
Topic 6. Diffusion Introduction: This exercise explores the physical phenomenon of diffusion and osmosis. Osmosis is simply the diffusion of water through a selectively permeable membrane. We will also
More informationMembrane Function. How does the cell membrane control movement of materials? Type 1 Ions Type 2 Molecules Type 3 Molecules Type 4 Molecules H O H
Why? Membrane Function ow does the cell membrane control movement of materials? The membrane is critical to the maintenance of homeostasis in living organisms. The cell membrane separates the cell from
More informationName: NYS DIFFUSION LAB REVIEW Date: PACKET 1: Difusion Through a Membrane
Name: NYS DIFFUSION LAB REVIEW Date: PACKET 1: Difusion Through a Membrane 1. The diagram below represents a laboratory setup used to demonstrate the movement of molecules across a selectively permeable
More informationChapter 7-3 Cell Boundaries
Chapter 7-3 Cell Boundaries The Plasma Membrane: Cell Membrane Regulates what enters and leaves the cell. Provides protection and support. Highly selective barrier!!!! What the plasma membrane is made
More informationLAB #3 - DIFFUSION AND OSMOSIS
DIFFUSION EXPERIMENT - pg. 4-6 LAB #3 - DIFFUSION AND OSMOSIS Definition of DIFFUSION - The natural tendency of particles to move from areas of high concentration to areas of lower concentration START
More informationFIGURE A. The phosphate end of the molecule is polar (charged) and hydrophilic (attracted to water).
PLASMA MEMBRANE 1. The plasma membrane is the outermost part of a cell. 2. The main component of the plasma membrane is phospholipids. FIGURE 2.18 A. The phosphate end of the molecule is polar (charged)
More informationRunning Head: ESTIMATING OSMOLARITY 1
Running Head: ESTIMATING OSMOLARITY 1 Lab Report on Estimating Osmolarity of Potato cells by Change in weight Name Class Instructor Date ESTIMATING OSMOLARITY 2 Abstract This experiment was carried out
More informationReview Guide for BIOL 150 Lab Exam 1 Montgomery College; Rockville Campus
Review Guide for BIOL 150 Lab Exam 1 Montgomery College; Rockville Campus Please note that questions in this document are a guide to prepare for Lab Exam 1. None of the questions are going to be copied
More informationNational 5 Biology Unit 1 Cell Biology Ink Exercise Two Cell Transport
National 5 Biology Unit Cell Biology Ink Exercise Two Cell Transport Name: Class: . Four thin sections of onion tissue were immersed in 5% sugar solution. The sections were left for 5 minutes then viewed
More informationPhospholipids. Extracellular fluid. Polar hydrophilic heads. Nonpolar hydrophobic tails. Polar hydrophilic heads. Intracellular fluid (cytosol)
Module 2C Membranes and Cell Transport All cells are surrounded by a plasma membrane. Eukaryotic cells also contain internal membranes and membrane- bound organelles. In this module, we will examine the
More informationRazi Kittaneh & Tamer Barakat. Bayan Abusheikha. Faisal Mohammed
3 Razi Kittaneh & Tamer Barakat Bayan Abusheikha Faisal Mohammed Transport and Osmolality In the last lecture we briefly talked about Transport, there are 2 types of transport: 1) Passive Transport 2)
More informationLab #6: Cellular Transport Mechanisms Lab
Lab #6: Cellular Transport Mechanisms Lab OVERVIEW One of the major functions of the plasma membrane is to regulate the movement of substances into and out of the cell. This process is essential in maintaining
More informationLAB Potato Cores Honors Biology, Newton North High
Name Date Block LAB Potato Cores Honors Biology, Newton North High BACKGROUND: Osmosis is a type of passive transport. No input of energy is needed in order for water to pass through a selectively permeable
More informationA molecule that can pass though the cell membrane.
Cell Membrane All cells and most organelles are surrounded by a protective barrier known as the cell membrane, aka the plasma membrane. Section of a cell membrane It is mostly made of phospholipids (fats).
More informationCH 7.2 & 7.4 Biology
CH 7.2 & 7.4 Biology LABEL THE MEMBRANE Phospholipids Cholesterol Peripheral proteins Integral proteins Cytoskeleton Cytoplasm Extracellular fluid Most of the membrane A phospholipid bi-layer makes up
More informationSlide 2 of 47. Copyright Pearson Prentice Hall. End Show
2 of 47 7-3 Cell Boundaries All cells are surrounded by a thin, flexible barrier known as the cell membrane. Many cells also produce a strong supporting layer around the membrane known as a cell wall.
More informationPassive Transport: Practice Problems PAP BIOLOGY
Passive Transport: Practice Problems PAP BIOLOGY #1 Draw a diagram where the cell has low concentration of salt molecules and the environment it is in has a high concentration of salt molecules in a water
More informationThe Plasma Membrane - Gateway to the Cell
The Plasma Membrane - Gateway to the Cell 1 Photograph of a Cell Membrane 2 Cell Membrane The cell membrane is flexible and allows a unicellular organism to move 3 Homeostasis Balanced internal condition
More informationCell Membrane Diagram
Cell Membrane Diagram Draw a diagram of the cell membrane. Please include (and label): - Phospholipid bilayer (hydrophilic and hydrophobic) Protein channel An ion pump Cholesterol Gylcoproteins* Define
More informationPlasma Membranes. Plasma Membranes WJEC GCE BIOLOGY 4.6
4.6 Repeat Fig 3.20A here Fluid Mosaic Model of the Plasma Membrane Carbohydrate chain Glycoprotein Intrinsic Protein Non-polar hydrophobic fatty acid Phospholipids Appearance of the Cell Membrane Seen
More informationAGENDA for 01/09/14 AGENDA: HOMEWORK: Due end of period OBJECTIVES:
AGENDA for 01/09/14 AGENDA: 1. 2.3.2: Diabetic Emergency! Blood Glucose Effects on Simulated Cellular Models Egg Demo Day 3 OBJECTIVES: 1. Design an experiment to simulate osmosis in body cells 2. Relate
More informationSafety. What You Need. What to do... Neo/SCI Student s Guide Name... Teacher/Section... Date... Step 1. Step 2
Diffusion & Osmosis Activity 1a Diffusion Lab 1 Background Diffusion occurs whenever concentrations of substances are not even throughout an area. This unequal distribution of particles is called a concentration
More informationOsmosis. Evaluation copy
Osmosis Computer 1B In order to survive, all organisms need to move molecules in and out of their cells. Molecules such as gases (e.g., O 2, CO 2 ), water, food, and wastes pass across the cell membrane.
More information