THE CELL Cells: Part 1
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1 THE CELL Cells: Part 1
2 OBJECTIVES By the end of the lesson you should be able to: State the 2 types of cells Relate the structure to function for all the organelles
3 TYPES OF CELLS There are two types of cells: 1. Prokaryotic 2. Eukaryotic
4 PROKARYOTES VS EUKARYOTES Cells fall into two broad categories, depending on whether they contain a nucleus Prokaryotes and Eukaryotes A nucleus is a large membraneenclosed structure that contains the cell s genetic material in the form of DNA Prokaryotic cells are cells that do not contain a nuclei and Eukaryotes are cells that contain a nuclei
5 PROKARYOTES Generally smaller and simpler than eukaryotes, although many exceptions Prokaryotic cells have genetic material that is not contained in a nucleus They all grow, reproduce, respond to their environment, and some can move Typically we call prokaryotes, Bacteria
6 EUKARYOTES Generally these cells are larger Usually contain dozens of structures and internal membranes and many are highly specialized Eukaryotes contain a nucleus in which their genetic material is separated from the rest of the cell Some are single-celled and others form multi-cellular organisms. Plants, animals, fungi and protists are eukaryotes
7
8 WHAT DO YOU REMEMBER?? Label your eukaryotic cells Plant and Animals
9 CELL MEMBRANE AKA: Plasma Membrane Confines the cytoplasm Controls what enters and leaves the cell Made of a phospholipid bilayer
10 CELL MEMBRANE Structure of Cell Membrane The fatty acid tails are water hating The phosphate heads are water loving There are proteins embedded in the membrane to transport molecules through the membrane
11 NUCLEUS Contains nearly all the cell s DNA and with it the coded instructions for making proteins and other important molecules Nuclear envelope a double layer of nuclear membrane with pores Chromatin DNA with protein (synthesis) Houses nucleoplasm, DNA and nucleoli Nucleolus Where Ribosomes are assembled Nuclear membrane is connected to the RER
12 RER & SER Endoplasmic Reticulum Made of cell membrane folded into sacs There are two types: 1. Rough: has ribosomes attached 2. Smooth: no ribosomes attached
13 RER & SER RER: processes proteins and sends them to the Golgi Apparatus SER: makes lipids, contain enzymes for specialized tasks, detoxifies poisons, drugs and other toxins
14 RIBOSOMES Found attached to the RER and floating in the cytoplasm Are the site of protein synthesis They receive coded instructions that come from the nucleus
15 GOLGI BODY AKA: Golgi Apparatus or Golgi Complex Made of flattened sacs of cell membrane Receives and exports proteins via vesicles
16 VACUOLES & VESICLES Membrane bound sacs used for storage Formed from ER and Golgi Apparatus
17 MITOCHONDRIA Powerhouse of the cell Converts chemical energy (glucose) into biological energy (ATP) Mitochondria comes from your mom!
18 CHLOROPLAST Site of photosynthesis, found in plants only Uses chlorophyll to convert light energy into chemical energy (glucose)
19 MIRCROTUBULES Hollow structures made up of proteins Maintain cell shape Cell division Centrioles: Located near the nucleus and help to organize cell division Centrioles are not found in plant cells
20 FLAGELLA & CILIA Microtubules also help build projections from the cell surface for things like flagella and cilia Flagella: move cells Cilia: move things past cells
21 CYTOSKELETON Gives the cell its shape and supports organelles Moves things inside the cell Made of microtubules, microfilaments and intermediate filaments
22 LYSOSOMES & PEROXISOMES Lysosomes: sac of hydrolytic enzymes that digest or breakdown lipids, proteins, and carbohydrates Peroxisomes: transfer hydrogen and detoxify parts of the cell
23 YOUR TURN! Crash Course Video Complete the Chart on Cell Organelles
Objectives. By the end of the lesson you should be able to: State the 2 types of cells Relate the structure to function for all the organelles
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