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Cell Membrane Worksheet

Directions: Pictured below is a cross section of a typical cell membrane. Use the numbers and terms to color each part. Color in the ( with the color that you are using for that term in the diagram. Once you have colored something one time, you should be able to find other examples of it in the membrane. Color all examples of it you see. By the time you have finished, ALL parts of the membrane should be colored in.

1. Phospholipids-- 1a. ( head

1b. ( tail

2. ( Cholesterol (another kind of lipid)

3. Proteins -- 3a. ( Integral Protein

3b. ( Peripheral Protein

4. ( Carbohydrates

5. ( Protein Channels

6. ( Cytoplasm

Use the above diagram and your notes to answer the following questions:

1. The ____________________________ separates eukaryotic animal cells from their surroundings. It also controls what can enter and exit the cell in all types of cells.

2. In plants and prokaryotes, the ______________ is the outermost layer that separates cells from their surroundings.

3. The plasma membrane is made up of three organic compounds, they are: ______________________, ______________________, and ______________________.

4. Which type of organic compound makes up the majority of the cell membrane? _____________________

5. The cell membrane structure can be shown using the ______________________________ model.

6. How many layers make up the cell membrane? ____________

7. What type of macromolecule can form channels that allow large or charged molecules to move through the membrane? _______________________

8. What does hydrophilic mean? _______________________

9. What type of macromolecule acts as an identification marker? _______________________

10. Label the Phospholipid. Include the terms: Phosphate Head, Fatty Acid Tail, Hydrophilic, Hydrophobic

Solutions, Concentrations, and Passive transport

Directions: (1) Label concentrations as low or high, and (2) include arrows and label them as which way the SOLUTE would move and which way the SOLVENT would move in passive transport (no energy required).

Example:

11. List and define the three types of passive transport:

1. _______________________--________________________________________________________

________________________________________________________________________________

2. _______________________--________________________________________________________

________________________________________________________________________________

3. _______________________--________________________________________________________

________________________________________________________________________________

12. What type of passive transport is taking place? For each of the substances moving across the membrane, label the type of transport as being Diffusion (D), Osmosis (O), or Facilitated Diffusion (F).

_______ Oxygen gas

_______ Large sucrose molecules

_______ Ca+2

_______ Water from a salt solution

_______ Neutral Iodine molecules

_______ H2O molecules

Solutions, Concentrations, and Active Transport

13. Active transport requires ___________________ to move material across the cell membrane because it is moving things against the concentration ____________________.

14. List and define the three types of Active Transport

1. _______________________--________________________________________________________

________________________________________________________________________________

2. _______________________--________________________________________________________

________________________________________________________________________________

3. _______________________--________________________________________________________

________________________________________________________________________________

15. Unlike in passive transport, pumps actively try to make the concentrations (circle) equal / unequal.

16. If sugar was VERY concentrated on the outside of a cell and active transport was taking place, a pump would move the sugar molecules (circle) into / out of the cell to make the concentrations unequal.

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High

Low

Solute

Solvent

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