1. The primary purpose of stratification, or layering, in skin cells is for increased _____________.

2. What part of the cell is responsible for breaking down and digesting things?

3. Which of the following would you NOT find in a bacterial cell?

4. Connective cells are somewhat similar to skin cells in all of these characteristics except ___________________.

5. Oxygen and carbon dioxide that enters or leaves a mammal's body must cross a _______cell.

6. The _____cell is flattened and spread out so that it can carry __________from one part of the body to another.

7. The only major type of cell specialized for movement is the _____ cell.

8. Which of the following shapes would allow a cell to have the greatest surface area-to-volume ratio?

9. All living things are composed of ______ types of cells.

10. Which of the following is found in white blood cells, but not red blood cells?

11. What type of cell serves to protect and regulate body temperature?

12. Which of the following is a role of a nerve cell?

13. Which of the following shapes would allow a cell to travel easily through the body?

14. The jellylike interior of the cell is called the:

15. The ______cell provides structure for movement in a mammal.

16. Which of the following is NOT a role of an adipose cell?

17. Which muscle tissue is multinucleate, voluntary, and bears striations?

18. What type of cell holds most organs in place?

19. An animal that is missing connecting cells would have difficulty doing what?

20. Which of these is not a connective cell?