Cell Membrane and Transport Study Guide

1. What does hydrophobic mean? ______

2. What does hydrophilic mean? ______

3. What part of the membrane is hydrophobic? ______What part is hydrophilic? ______

4. What structure is found within the cell membrane to help transport substances from one side to the other? ______

5. What are any channels and/or pumps within the membrane made out of? ______

6. What are three components of phospholipids ? a. b. c. 7. Can materials like gases, water, and small particles pass through the cell wall? ______

8. Substances like water and dissolved particles are constantly passing through the cell membrane to maintain a cell’s ______.

9. ______proteins help regulate what can enter and leave a cell.

10. The ability of the cell membrane to allow certain molecules to come into the cell while keeping other molecules out is called ______.

11. Name the two types of transport proteins. ______and ______

12. What proteins form channels to allow molecules to pass through? ______

13. What proteins change shape to allow molecules to pass through? ______

14. The ability of the cell membrane to be flexible and move like the flow of water is called the ______.

15. Diffusion is the movement of molecules from an area of ______concentration to an area of ______concentration.

16. Do molecules constantly move and collide with each other or do they never collide? ______

17. In an isotonic solution, do particles ever stop moving across the membrane? ______

18. What kind of transport does not require energy? ______

19.When water moves into a cell, it is in a ______solution. 20.When water leaves a cell, it is in a ______solution.

21.What happens to the shape of a cell placed in a hypotonic solution? ______

22.What happens to the shape of a cell placed in a hypertonic solution? ______

23.What kind of transport requires energy? ______

24.The diffusion of water is called ______.

25. Name three types of passive transport. ______, ______, and ______.

26.When the concentration of dissolved substances is greater inside the cell than outside the cell it is a ______solution.

27.When the concentration of dissolved substances is greater outside the cell than inside it is a ______solution.

28.When the concentration of dissolved substances inside a cell equals the concentration outside a cell it is a ______solution.

29.Passive transport is the movement of particles from an area of ______concentration to an area of ______concentration.

30.Active transport is the movement of particles from an area of ______concentration to an area of ______concentration.

31.What are three things that affect the speed of diffusion? ______, ______, and ______.

32.The ______is an unequal distribution of particles.

33.Will a cell swell or shrink when placed in pure water? ______in saltwater? ______

34.Does passive transport occur with or against the concentration gradient? ______

35.Does active transport occur with or against the concentration gradient? ______

36.Does facilitated diffusion require transport proteins? ______Does simple diffusion require transport proteins? ______

37.Name two types of active transport. ______and ______

38.______is the process where a cell engulfs material.

39.______is the process where a cell expels or secretes materials.

40.What are two things that both passive and active transport do? a. b.