Aa Normal No Spacing HANDWRITTEN ANSWERS WILL NOT BE ACCEPTED; IF YOUR PRINTER I

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Aa Normal No Spacing HANDWRITTEN ANSWERS WILL NOT BE ACCEPTED; IF YOUR PRINTER IS NOT WORKING PLEASE EMAIL ME YOUR ANSWERS BEFORE CLASS MEETS AT 11 AM ON . 1. Describe the meaning behind the terms "Fluid" and "Mosaic" in the Fluid Mosaic Model of cell membrane structure: 2. List the 3 things found in all prokaryotic and eukaryotic cells 3. 4. 5. Which organelles are only found in animals? Which organelles are only found in plants? Which organelles are found in BOTH plant and animal cells? 6. List the types of cell junctions found in animal tissue vs, those found in plant tissue. 7. State three ways that simple diffusion, facilitated diffusion and active transport across a cell membrane differ.(make a table that includes up or down gradient, +/-energy need, and +/- carrier need) 8. Name three types of structural fibers that make up the cytoskeleton and their monomers: Describe the Na/K electrochemical pump-what is the actual chemical gradient? What is the actual electrical gradient? 9. 10. Describe two components and one function of the extracellular matrix. 11. Describe at least 3 types of proteins that are found in cell membranes and their FUNCTION 12. What is the endomembrane system? Bonus: 1. Does the contractile vacuole of a paramecium work more when it is swimming in a hypotonic,| isotonic, or hypertonic environment? 2. How do oral rehydration salts help to rehydrate people with severe diarrhea such as cholera?

Explanation / Answer

Answer

1. Fluditity is based on fatty acid present in the membrane. Fatty acids brings the fluid nature of the membrane.
Mosaic model is based on protein present in the membrane. Intergal membrane protein used for ion channels and external membrane protein acts as a receptor or many function.

2. Ribosomes, DNA and proteins

3. Lysosomes -

4. Chloroplast

5. Endoplasmic reticulum

6. Plasmodesmata - In plant cells
Gap junction - ANIMAL CELLS

7. Simple diffusion - Down gradient, No energy and No carrier needed
Facilitaed diffusion - Down gradient, No energy, and carrier needed
Active transport - Up gradient, energy, and carrier needed

8. Actin filaments - Actin monomers,
Intermediate filaments
Microtubles - Tubulin monomers

9. Na/K pump is a energy dependent process. Na + /K + -ATPase pumps sodium out of cells while pumping potassium into cells viceversa. In chemical gradient the inside the cell Na+ ions low and K+ is high.
In Electrical gradient inside the cell Na+ ions high and K+ is low. Na+ ions enter into the cell and makes the cells more posite is used to generate a potential difference between inside and out of the cell.

10.ECM consists of proteoglycans - Hepran sulphate for cell signalling, keratan sulfate and fibrous protein - Gives strength.

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