Cell Transport Review Sheet.
Part I – Label the following:
Part II – Fill in the blank
1. The process of diffusion causes molecules to move from (low to high or high to low) concentrations until a state of ______is reached.
2. The diffusion of water is known as ______.
3. ______diffusion uses proteins to bring materials into the cell from high to low concentration, requiring no cell energy.
4. Diffusion, osmosis and facilitated diffusion are all examples of ______transport, in which the cell does not need to use any energy.
5. During active transport molecules move from an area of ______concentration to an area of ______concentration.
6. ______is a form of active transport in which the cell sends materials out of the cell using vesicles, small storage structures that fuse to the cell membrane.
7. ______is the reverse of the process named in # 6. The cell membrane wraps around a substance to be brought into the cell forming a vesicle around it.
8. There are two types of endocytosis: ______which involves bringing solids or large molecules into the cell, and ______, which deals with bringing liquids or very small molecules into the cell.
9. In the pictures below each “X” represents a molecule of water. In each diagram indicate which direction water will be moving (mostly in, mostly out, or equally in and out).
A. B. C.
10. Look at each of the pictures below. Identify whether the picture represents a plant cell in hypertonic, hypotonic or isotonic solutions.
A.______B.______C.______
11. Look at each of the pictures below. Identify whether the picture represents a blood cell in fresh water (small amount of solute), distilled water (100% water) or salt water (lots of solute). A.______B.______C. ______
12. Would a potato left in salt water lose or gain water? Think about what is different about the amount of water inside and outside the cell, and what state were the potato cells trying to reach?
13. The cell in this beaker is bathed in a 5% NaCl (salt) solution. The membrane is permeable to water but not to NaCl.
i. In which direction is the net movement of water here?
ii. Is the solution around the cell hypertonic or hypotonic?
iii. Will the cell shrink or swell?
14. How do facilitated diffusion and active transport differ?
List at least two ways:
______
______
15. Is osmosis an example of diffusion or active transport (use evidence to support your answer)?
16. Why does water need a special protein channel (called an aquaporin) to move into the cell through the phospholipid bilayer.
17. Draw a picture of a phospholipid below and label the non-polar tails, and polar head.
18. Passive transport moves materials with/against the concentration gradient using energy/no energy. Also draw two arrows on the figure below labeling one “with concentration gradient” and the other “against concentration gradient”.
19. Active transport moves materials with/against the concentration gradient using energy/no energy.
20. State how each of the molecules/ions listed below would move through the plasma membrane (pick from: PC= protein channel or SD = simple diffusion – through phospholipids).
a. Glucose ______
b. Water ______
c. Oxygen ______
d. Na+ ______
e. K+ ______
f. Cl- ______
g. CO2 ______
21. Identify which type of active transport each of the cells below are doing (exocytosis, endocytosis, protein pumps).
______
Use the picture on the left to answer the questions on the right.
22. After you have eaten and digestion occurs:
a. Which area has the higher concentration of glucose? ______
b. Which way will the glucose move (in or out of cell)? ______
c. Does this require energy? ______
d. Is this active or passive transport? ______
e. What specific type of transport is this knowing that glucose is a large polar molecule? ______
______