CELL TRANSPORT TEST REVIEW
1. The spreading out of molecules from an area of higher concentration to an area of lower concentration is called _________________.
2. The cell structure most responsible for controlling what can enter and leave a cell is the ____________ _____________.
3. What two molecules make up the cell membrane?
A.
B.
4. Because the cell membrane allows only certain materials to pass through, it is said to be ___________ __________.
5. Water can pass through the cell membrane by ____________.
6. The law of osmosis says that water will move from an area of __________ concentration to an area of __________ concentration.
7. The difference in concentration on different sides of a barrier is known as ____________ ____________.
8. Glucose gets into our cells by the assistance of special protein molecules called __________ __________.
9. The process by which glucose is transported across the cell membrane by these special proteins is called ________________ ________________.
10. Oxygen and carbon dioxide can easily pass through the cell membrane because they are both soluble in ___________.
11. The process by which oxygen and carbon dioxide both pass in or out of the cell is ____________.
12. When the cell engulfs its food by surrounding it and trapping it in a vacuole, this is called _______________.
13. When the cell releases waste through a vacuole, this is called ________________.
14. Diffusion and osmosis do not require energy and therefore are known as ______________ transport.
15. Give examples of passive transport:
A.
B.
C.
16. When energy is required to move molecules in or out of a cell, the process is known as ___________ transport.
17. The energy molecule used to move molecules across the cell membrane when energy is required is __________.
18. Give some examples of active transport.
A.
B.
C.
19. Protozoa in freshwater environments have a ___________ ___________ to collect and pump excess water out of the cell.
20. The internal balance within the cell and its environment is called ________________.
_____21. The substance that dissolves in a solution is the
A. Concentration C. solute
B. Diffuser D. solvent
_____22. During diffusion, molecules tend to move
A. Up the concentration gradient
B. Down the concentration gradient
C. from an area of lower concentration to an area of higher concentration
D. in the direction that doesn’t depend on concentration
_____23. When the concentration of a solute is the same throughout a system, the system has reached
A. maximum concentration C. osmotic pressure
B. Dynamic equilibrium D. level gradient
_____24. The diffusion of water across a selectively permeable membrane is called
A. Active transport C. facilitated diffusion
B. Osmosis D. phagocytosis
_____25. Glucose enters cells by
A. Facilitated diffusion C. bulk transport
B. Osmosis D. ion channels
_____26. The energy molecule needed for active transport is
A. Potassium C. phospholipids
B. Sodium D. ATP
_____27. All of the following are active transport except
A. Contractile vacuoles C. ion pumps
B. Bulk transport D. osmosis
_____28. If the solute (dots) in this diagram is unable to pass through the
Membrane, what will happen?
A. The water level will rise on the right side of the tube
B. The water level will rise on the left side of the tube
C. The water level will stay equal on the two sides
D. The solute concentration will equal out on both sides
_____29. Placing wilted lettuce in cold water will make it crisp again. Which statement best describes
what happens to restore the lettuce to its original condition?
A. Water left the lettuce cells by diffusion
B. Water entered the lettuce cells by osmosis
C. Osmosis caused salt to enter the lettuce cells
D. Salts in the leaf were removed by the cold water
_____30. What would happen to a freshwater fish if it was place in a salt water aquarium?
A. The cells in the fish would burst killing the fish
B. The fish would get larger due to gaining water
C. The fish would die due to its cells losing water
D. The fish would adapt and be fine
_____31. Look at the cells below. Which cell would lose water?
A. C.
B. D.