Passive Transport Lab: Diffusion and Osmosis
|
|
- Roland Benson
- 6 years ago
- Views:
Transcription
1 Name Date Period Passive Transport Lab: Diffusion and Osmosis OBJECTIVE: Apply your understanding of the processes of diffusion and osmosis to explain observational data. PART A: Starch and Iodine MATERIALS 25 cm piece of 2.5-cm dialysis tubing (pre-soaked) 250 ml beaker Small funnel tap water 1% starch solution Lugol s Iodine (IKI) solution Paper towel Scale PROCEDURE Figure 1. Experimental Setup. 1% starch solution ( 1. Prepare the Beaker A. Fill a 250 ml beaker approximately two-thirds full with warm tap water (just estimate). B. Add enough Lugol s iodine solution to the water to make it turn dark yellow. (WARNING: Iodine stains and will severely damage your eyes!) 2. Prepare the Bag A. Obtain a piece of soaked dialysis tubing. Tie off one end of the tubing by making a tight knot. B. Using a funnel, slowly add 15 ml of the 1% starch solution to the bag. Remove all remaining air from the bag. Leave about 2 inches of empty space in the bag, and then tie off the open end of the tube by making another knot. C. Get the mass of the bag. Enter these data and other information in the DATA TABLE on page 2. D. Run the bag under tap water to remove any excess starch from the outside of the bag. THIS IS IMPORTANT! 1
2 3. Fully immerse the bag in the Iodine solution. (See Figure 1 on the previous page.) Allow the bag to incubate in the beaker for ~ minutes, at room temperature. 4. While the bag is incubating, answer the questions below: QUESTION 1: You are studying how molecules move in and out of cells. The bag full of starch is supposed to represent one animal cell. What part of the cell is the dialysis tubing supposed to be? QUESTION 2: Starch is inside the cell. Draw a picture of one starch molecule in the space below. Is starch a large molecule or a small molecule (relative to something like water)? QUESTION 3: Lugol s Iodine is a molecule made of only three atoms: I 2 K. Compared to starch, is Lugol s Iodine a big or a small molecule? QUESTION 4: Do you think starch molecules will be able to pass through the cell membrane (dialysis tubing) and get out of the cell (the bag)? Why or why not? QUESTION 5: Do you think the Iodine molecules (I 2 K) will be able to pass through the cell membrane (dialysis tubing) and get into the cell (the bag)? Why or why not? COLLECT DATA After the incubation period, pull the bag out of the beaker and dry it using a paper towel. Get the mass of the bag and look at the color of the solution in the bag. When exposed to starch, iodine changes from brown/yellow to purple/blue. Any areas of this darker color indicate that the starch and the iodine molecules have moved and come in contact with each other. Look at the color of the solution in the beaker. Enter all data in the table below. DATA TABLE. Starch bag in iodine data. Color of solution in the bag ( cell ) Originally Color of solution in beaker Mass of the bag ( cell ) After Incubation 2
3 ANALYZE THE DATA: QUESTION 1: Based on the color of the starch solution, did Iodine molecules move into the bag? Explain. QUESTION 2: Based on the color of the solution in the beaker, did starch molecules move out of the bag? Explain. QUESTION 3: Based on the mass of the bag, did water molecules move into the bag? Explain. QUESTION 4: What is the name of the process by which iodine or starch molecules move from an area of high concentration to an area of lower concentration? QUESTION 5: What is the name of the process by which water molecules move from an area of high concentration to an area of lower concentration? QUESTION 6: Why did the molecules mentioned above move in the direction they moved? QUESTION 7: Why were certain molecules able to passively move through the cell membrane, while others were not? (HINT: There is one, simple reason.) QUESTION 8: In real cells, the cell membrane is selectively permeable. Did the dialysis tubing act like a selectively permeable membrane? Explain. 3
4 PART B: Plants and their environment 1.) Get a piece of paper towel and bring it to your lab station (desk). 2.) Draw a line down the middle of the paper towel. Label one half of the paper towel Pure Water and the other half Salt Water. 3.) From the small beakers, get one piece of celery that has been sitting in a solution of pure water (100% water), and put in on the half of the paper towel labeled Pure Water. 4.) Get one piece of celery that has been sitting in salt water (10% NaCl, 90% water), and put in on the half of the paper towel labeled Salt Water. 5.) Look at and test the rigidity of the celery (try to snap it in half by bending it). Record your observations about the appearance and rigidity of the two pieces of celery in the data table below: DATA TABLE. Celery Observations. Celery in Pure Water Celery in Salt Water Appearance Texture/Rigidity 6.) Dispose of the celery, clean up, and answer the analysis questions below. ANALYSIS QUESTIONS: QUESTION 1: Celery tissue is made of millions of plant cells. Based on your data, what did the cells in the pure water celery tissue probably look like, and what did the cells in the salt water celery tissue look like? Make a simple sketch below. PURE WATER SALT WATER 4
5 QUESTION 2: Think about the texture/rigidity of the celery that was in salt water. A.) Was the celery hard or wilted? B.) Based on your answer to part A, what molecule most likely moved out of the celery s cells? C.) What is the name of the process described in part B? D.) Why would the molecule in part B move out of the cells? QUESTION 3: If you put the salt water celery in a beaker of pure water, what do you think would eventually happen to the appearance and rigidity of the celery? Explain what molecule would move to cause this change, and why that molecule would move in that direction. You may use well labeled drawings to support your answer. QUESTION 4: If water moved into an animal cell, it would swell and could eventually explode. Why wasn t the celery tissue destroyed by the cells swelling/exploding? What do plant cells have to protect them against this? You may use well labeled drawings to support your answer. 5
Diffusion 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 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 informationCell Membranes: Diffusion and Osmosis
STO-112 Cell Membranes: Diffusion and Osmosis Part 1: Diffusion Diffusion is a process by which molecules move into or out of cells. To diffuse into or out of a cell, molecules must pass through the cell
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 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 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 informationDiffusion across a Selectively Permeable Membrane
Diffusion across a Selectively Permeable Membrane Each cell is surrounded by a selectively permeable cell membrane Cell Membrane which regulates what gets into and out of the cell. A selectively permeable
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 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 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 informationBiology Cell Unit Homework Packet #3
Biology Cell Unit Homework Packet #3 Name DUE: Hour HW #5 Egg Demo Drawings Analysis HW #6 Elodea Drawings lab Analysis HW #7 Cell Questions Membrane and Transport HW #8 Questions / 5 possible points Homework
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 informationBiology Cell Unit Homework Packet #3
Biology Cell Unit Homework Packet #3 Name DUE: Hour HW #5 Egg Demo Drawings Analysis HW #6 Elodea Drawings lab Analysis HW #7 Cell Questions Membrane and Transport HW #8 Questions / 5 possible points Homework
More informationName: There are two things that will determine which particles will pass through and which will not:
18 Diffusion and Osmosis in Living Systems Name: Problem: How do substances move into and out of cells? Introduction: In order for cells to carry on their life processes, they must take in materials 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 informationChapter MEMBRANE TRANSPORT
Chapter 3 I MEMBRANE TRANSPORT The cell membrane, or plasma membrane, is the outermost layer of the cell. It completely surrounds the protoplasm or living portion of the cell, separating the cell s interior
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 informationName: Date Block Selective Permeability
LAB Name: Date Block Selective Permeability OBJECTIVES: Observe the selective permeability of an artificial membrane. Observe diffusion of substances across an artificial membrane. Devise a model for the
More information250-mL beakers. iodine solution metric ruler. 10-mL graduated cylinders pipettes. (Read the Procedure first to answer the Questions)
Detecting Diffusion Introduction A cell membrane is a selectively permeable barrier. Some particles can pass through the cell membrane while other particles are held back. Solutes that can move across
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 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 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 informationExperimental Design and Investigating Diffusion and Osmosis
Bio 101 Name: Experimental Design and Investigating Diffusion and Osmosis OBJECTIVES: To practice applying hypothesis testing. To further your understanding of experimental design. To gain a better understanding
More informationDiffusion and Osmosis
Diffusion and Osmosis OBJECTIVES: 1. To explore how different molecules move by diffusion and osmosis through semi-permeable membranes. 2. To understand how concentration affects the movement of substances
More informationObserving Osmosis Lab
Observing Osmosis Lab Background Information: Molecules are in constant motion, and tend to move from areas of higher concentrations to areas of lower concentrations. Diffusion is defined as the movement
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 informationName Date. In this lab investigation you will investigate the movement of water through a selectively permeable membrane.
This lab will be hand-written in your data book AP Osmosis Labs Part A (was done in previous a previous class: Dialysis tube + Starch + Glucose) Part B: Osmosis Unknowns In this lab investigation you will
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 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 informationTable of Contents Title Page Number Due Date Stamp
1 Table of Contents Title Page Number Due Date Stamp Calendar 3 Warm - Ups 4 Carbon Based Molecules 5 02/20/2018 Notes Cell Membrane Notes 8 02/20/2018 Membrane Structure and Cell Signaling Worksheet Diffusion
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 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 informationDIFFUSION AND OSMOSIS
Lab 5 DIFFUSION AND OSMOSIS OBJECTIVES Describe the process of diffusion at the molecular level; State the physical factors that determine the direction and rate of diffusion; Discuss why diffusion rates,
More informationLAB 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 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 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 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 informationBio10 Lab 2: Cells. Using your text and the cell models and posters in the lab, sketch an animal cell and a plant cell on the group results sheet.
Bio10 Lab 2: Cells Cells are the smallest living things and all living things are composed of cells. They are able to perform all necessary metabolic functions as well as specialized tasks such as moving,
More informationCellular Transport. 1. A potato core was placed in a beaker of water as shown in the figure below.
Name: Date: 1. potato core was placed in a beaker of water as shown in the figure below. Which diagram best represents the net movement of molecules?.. C. D. page 1 2. The following question(s) is/are
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 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 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 informationWarm Up 12/06/2018. In a Solution of Salt Water, which substance acts as the Solvent and which substance acts as the Solute?
Warm Up 12/06/2018 In a Solution of Salt Water, which substance acts as the Solvent and which substance acts as the Solute? Cell Membrane and Cell Transport How Nutrients move in and Wastes Move Out of
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 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 informationCell Diffusion & Permeability: See-Through Eggs Teacher Version
Cell Diffusion & Permeability: See-Through Eggs Teacher 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 various
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 informationQuotes from Next Generation Science Standards, available at
Teacher Preparation Notes for Diffusion across a Selectively Permeable Membrane Drs. Jennifer Doherty and Ingrid Waldron, Department of Biology, University of Pennsylvania, 2015 1 Students investigate
More informationIdentification of Organic Compounds Lab
Identification of Organic Compounds Lab Introduction All organic compounds contain the element carbon (C). Organic compounds usually also contain oxygen (O) or hydrogen (H) or both. They may also contain
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 informationUnit 3: Cellular Processes. 1. SEPARTION & PROTECTION: the contents of the cell from the. 2. TRANSPORT: the transport of in and out of the cell
Unit 3: Cellular Processes Name: Aim #14 Cell Membrane: How does the cell membrane function to maintain homeostasis? Date: _ I. The Cell Membrane: What is it? Also known as A thin structure that acts as
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 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 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 informationName: Per. Date: / 71 points MACROMOLECULE LAB: Testing for the Presence of Macromolecules
Name: Per. Date: / 71 points MACROMOLECULE LAB: Testing for the Presence of Macromolecules Introduction: There are four broad classes of macromolecules that can be found in living systems. Each type of
More information= only some molecules can get in or out of the cell. allow substances (other than lipids) in and out
Name: Cell Membrane and Cell Transport Notes 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 what gets
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 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 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 informationDiffusion, osmosis, transport mechanisms 43
Diffusion, osmosis, transport mechanisms 43 DIFFUSION, OSMOSIS AND TRANSPORT MECHANISMS The cell membrane is a biological membrane that separates the interior of all cells from the outside environment
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 6: Cellular Respiration
Lab 6: Cellular Respiration Metabolism is the sum of all chemical reactions in a living organism. These reactions can be catabolic or anabolic. Anabolic reactions use up energy to actually build complex
More informationPassive Transport. Does not expend cellular energy for the movement to take place. Ex-rolling down a hill
Passive Transport Fluid Mosaic Model Passive Transport Does not expend cellular energy for the movement to take place Ex-rolling down a hill Parts of a Solution Solute: what gets dissolved Solvent: What
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 informationName: Teacher: Ms. Petrakos. Lesson #21 - Cell Transport Diffusion Review
Name: Teacher: Ms. Petrakos Lesson #21 - Cell Transport Diffusion Review Figure 1 Base your answer to the question on the diagram below and on your knowledge of biology. The diagram represents an experimental
More informationVANDERBILT STUDENT VOLUNTEERS FOR SCIENCE
VANDERBILT TUDENT VOLUNTEER FOR CIENCE http://studentorgs.vanderbilt.edu/vsvs Diffusion Fall 2018 oal: To understand diffusion, the process in which there is movement of a substance from an area of high
More informationWhat is the function of the cell membrane?
What is the function of the cell membrane? 1. DIFFUSION: The movement of molecules from an area of high concentration to an area of lower concentration. Why do molecules move from high concentration to
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 informationOsmosis Practice Problems. Good practice for test-taking strategy, too.
Osmosis Practice Problems Good practice for test-taking strategy, too. #1 If you soak your hands in dishwater, you may notice that your skin absorbs water and swells into wrinkles. This is because your
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 informationOsmosis in Potato Slices
Osmosis in Potato Slices Vanderbilt Student Volunteers for Science Training Presentation 2018-2019 VINSE/VSVS Rural Important! Please use this resource to reinforce your understanding of the lesson! Make
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 informationScience Biology Unit 04 Exemplar Lesson 02: Homeostasis and Membrane Transport
Science Unit 04 Exemplar Lesson 02: Homeostasis and Membrane Transport Science Unit: 04 Lesson: 02 Suggested Duration: 7 days This lesson is one approach to teaching the State Standards associated with
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 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 informationOsmosis. Computer OBJECTIVES
Osmosis Computer 22 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 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 informationSc ienc e 10-Biology Ac t ivit y 6 Ex perim ent on Osm osis
Sc ienc e 10-Biology Ac t ivit y 6 Ex perim ent on Osm osis Name Due Date 10 Show Me Hand In Correct and Hand In Again By Purpose: To observe cells in osmotic balance and osmotic imbalance. Introduction:
More informationLab: Organic Compounds
Lab: Organic Compounds Name(s) Date Period Benchmark: SC.912.L.18.1: Describe the basic molecular structures and primary functions of the four major categories of biological macromolecules. Background:
More informationChapter 3: Cell Structure and Function Assignment
Chapter 3: Cell Structure and Function Assignment Provide full detail and be specific for full marks. 1. How do these organelles work together? 2 marks each = 10 marks a. lysosomes and vacuoles When material
More information3. What is used to test for the presence of simple reducing sugars such as monosaccharides?
Lab 7-1 Analysis and s 1. What is used to test for the presence of starch? 2. How can you tell by using this test that a substance contains starch? 3. What is used to test for the presence of simple reducing
More informationDiffusion and Osmosis
Diffusion and Osmosis Keywords Diffusion Osmosis Selectively permeable Turgor Pressure Keywords Visking Tubing Food preservation Selectively Permeable membranes Selectively permeable membrane allows some
More informationGCSE. Biology Practical Manual. Unit 3: Practical Skills CCEA GCSE TEACHER GUIDANCE. 2.1 Investigate the process of osmosis
GCSE CCEA GCSE TEACHER GUIDANCE Biology Practical Manual Unit 3: Practical Skills 2.1 Investigate the process of osmosis For first teaching from September 2017 Practical 2.1 Investigate the process of
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 informationCh 3 Movement of substances across cell membrane
Ch 3 Movement of substances across cell membrane Practical 3.1 Demonstration of osmosis using dialysis tubing Results (p. 3-2) Set-up Experimental Control Rises Change in liquid level in the capillary
More information8 LIFE PROCESSES NUTRITION TRANSPORT REGULATION SYNTHESIS EXCRETION GROWTH REPRODUCTION RESPIRATION
8 LIFE PROCESSES NUTRITION REGULATION EXCRETION REPRODUCTION TRANSPORT SYNTHESIS GROWTH RESPIRATION LIFE PROCESSES Nutrition (ingestion, digestion, egestion) 1- Nutrients are used by all living things
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 informationEXERCISE 5. Enzymes H amylase + starch + amylase-starch complex maltose+ amylase.
EXERCISE 5 Enzymes LEARNING OBJECTIVES Demonstrate enzyme activity by the hydrolysis of starch by amylase. Determine the effect of different temperatures on the rate of starch hydrolysis. Determine the
More information4. 10/09/14 Ch. 5: Populations /22/14 Ch. 2: Chemistry of Life 55
Table of Contents # Date Title Page # 1. 1 2. 09/02/14 Ch. 1: The Science of Biology 09/16/14 Ch. 4: Ecosystems and Communities 17 3. 09/23/14 Ch. 3: The Biosphere 26 4. 10/09/14 Ch. 5: Populations 45
More information8.8b Osmosis Project. Grade 8 Activity Plan
8.8b Osmosis Project Grade 8 Activity Plan Reviews and Updates 2 8.8b Osmosis Project Objectives: 1. To demonstrate osmosis and the permeability of the cell membrane. 2. Use plant cells to demonstrate
More informationThe students measured the mass of four of the potato sticks using an electronic balance.
1 Some students investigated osmosis in raw potato sticks. (a) Define the term osmosis. [3] (b) The students measured the mass of four of the potato sticks using an electronic balance. Fig. 4.1 shows an
More informationLab Ch 6 Mole Buffet Lab Activity
Lab Partners: Prelab must be complete before entering lab!!! (no prelab = you receive zero points lab) Show the calculations for molar mass for the following chemicals: (Show all work, units, and correct
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 informationDigestive Enzyme Lab
Digestive Enzyme Lab Objectives 1. To describe the function of enzymes 2. To define: reactants, products, activation energy 3. To describe the enzymatic digestion of carbohydrates by salivary amylase 4.
More informationEgg-speriment (Osmosis Lab) 2009
Purpose/Objectives: Osmosis can have important consequences for the cell. The purpose of this lab is to study the effects of osmosis on a cell that is submerged in different aqueous environments: vinegar,
More informationOrganic Compounds in the Foods
Organic Compounds in the Foods Purpose: This lab activity will help you understand the chemical composition (i.e., carbohydrates, proteins, and fats) of the foods that you eat. Materials we will be using:
More information3 Movement in and out of cells
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ Movement in and out of cells Question Paper Level IGSE Subject iology Exam oard ambridge International Examinations Unit 3 Movement
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 information