Cell Transport Review

1. Cell Transport Review

2. Name two functions of the cell membrane. • Regulate what enters/exits the cell • Provides support

3. What is the purpose of cholesterol? • Keeps the phospholipids from sticking together • Keeps membrane flexible

4. A phospholipid contains a phosphate head that is best described as • - non-polar and hydrophobic • - non-polar and hydrophilic • - polar and hydrophilic • - polar and hydrophobic

5. If a solution is isotonic, what will water molecules do? • Move equally throughout the solution

6. How do phospholipids arrange themselves within the membrane? • In a double layer with the phosphate heads facing outward and the lipid tails on the inside

7. A phospholipid contains two fatty acids tails that are best described as • polar and hydrophilic. • polar and hydrophobic. • non-polar and hydrophilic. • non-polar and hydrophobic.

8. Carbohydrates serve what purpose for the cell membrane?

9. Define selectively permeable.

10. Define concentration gradient.

11. What are 2 similarities between endo and exocytosis?

12. If I’m going down the concentration gradient, I’m going……

13. Name the 1st type of passive transport and define it.

14. Name the 2nd type of passive transport and define it.

15. Name the 3rd type of passive transport and define it

16. What would happen to an animal cell with an internal salt concentration of 15% if it were placed in a salt solution with a concentration of 0.8%?

17. Potato cells are approximately 99% water and 1% salt. What would happen to a potato cell if it was put into 30% salt solution?

18. In which osmotic solution is a plant in a turgid or normal state?

19. What is the difference between passive and active transport?

20. How are facilitated diffusion and active transport similar?

21. If I’m going against the concentration gradient, I’m going……

22. What is exocytosis?

23. Define dynamic equilibrium.

24. What is endocytosis?

25. How does a protein pump different than a protein channel?