1. CHAPTER 4 Cell Transport
Practice Test

2. The concentration of many types of substances1
The concentration of many types of substances
eventually becomes balanced on both sides of a membrane this is called isotonic

3. from an area of high concentration to an area of low concentration2
Diffusion takes place
from an area of high concentration to an area of low concentration

4. Refer to the illustration above
Refer to the illustration above. Which cell is most likely to lose both water molecules and solute molecules as the system approaches equilibrium? 3
cell 4

5. Refer to the illustration above
Refer to the illustration above. In this system, solute molecules in cell 2 are most likely to 3
diffuse into cell 1

6. Refer to the illustration above
Refer to the illustration above. In which direction are water molecules in this system most likely to diffuse? 3
from 3 to 1

7. The dispersal of ink in a beaker of water is an example of4
The dispersal of ink in a beaker of water is an example of
diffusion.

8. Channels utilizing facilitated diffusion5
Channels utilizing facilitated diffusion
work in two directions.

9. It moves substances against a concentration gradient6
Which of the following is not characteristic of facilitated diffusion? a. It requires a carrier protein. b. It moves substances against a concentration gradient. c. It requires no energy input. d. It involves a change in the shape of its carrier.
It moves substances against a concentration gradient

10. 7
Which of the following enters a cell by active transport? a. glucose b. water c. lactose d. potassium ion
potassium ion

11. 8
The process by which water passes into or out of a cell through a membrane is called
osmosis.

12. The sodium-potassium pump usually pumps9
The sodium-potassium pump usually pumps
potassium into the cell

13. 10
Ridding the cell of material by discharging it from sacs at the cell surface is called
exocytosis

14. 11
Molecules that are too large to be moved through the membrane can be transported into the cell by
endocytosis

15. A calcium ion channel will allow12
A calcium ion channel will allow
only calcium ions to pass through it.

16. ATP stores energy for cells to use in the bonds between its12
ATP stores energy for cells to use in the bonds between its
phosphates

17. The process shown is called12
The process shown is called
Diffusion
No membrane is involved

18. 13
Refer to the illustration above. The process shown in figure Y is called ____________________.
exocytosis

19. 13
The process in which an amoeba engulfs its prey and takes it in is known as ____________________.
phagocytosis

20. 13
Refer to the illustration above. Cells often trap extracellular particles and fluid. This is shown in figure ____________________. X

21. 29
The END

22. 35

26. The End

28. 1

29. 1

30. 1

31. 1