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Unit 3 Review - Homeostasis
1. What is homeostasis?
2. Give two examples of things that are kept balanced in your body.
3. What does a feedback system do?
4. What is a positive feedback system?
5. What is the basic unit of life?
6. What are three differences between a prokaryotic and eukaryotic cell?
7. What are the three main parts of a eukaryotic cell?
8. Draw a diagram of a cell membrane. Label phospholipids, proteins, and carbohydrates.
9. What is the function of the cell membrane?
10. Describe selective permeability.
11. Which type of cell does NOT have a cell wall?
12. What is the function of the cell wall?
13. What makes up the cell wall in plants?
14. Describe the function of the nucleus.
15. Where is chromatin found? What does it contain?
16. What is the function of the nuclear membrane?
17. What is cytoplasm?
18. What are organelles?
19. What is the function of mitochondria?
20. What is the purpose of ribosomes?
21. What do vacuoles do? Name two types of vacuoles.
22. What is the function of lysosomes?
23. What is the importance of centrioles?
24. What organelle is found only in plant cells and what is it’s function?
25. How do cilia aid (help) cells?
26. How do flagella differ from cilia? How are they the same?
27. Label the cells below. (prokaryotic or eukaryotic)
28. Match the picture with the function of the cell structure.
A.
B.
C.
D.
____found only in plant cells
____ controls cell activities
____ transforms energy in all eukaryotic cells
____ manufactures proteins
29. Name two differences between active and passive transport.
30. What is a concentration gradient?
31. What is diffusion?
32. Which way is oxygen diffusing in the diagram below?
80 units O2
capillary
15 units O2
33. What is facilitated diffusion?
34. What is the role of transport (carrier) proteins?
35. What is osmosis?
36. What controls osmosis?
37. Draw arrow(s) showing which way water is moving in the diagrams below.
10%
salt
10%
salt
2%
salt
10%
salt
30%
salt
10%
salt
38. Describe a plant with turgor pressure and a plant that has undergone plasmolysis.
turgor pressure
plasmolysis
39. Label the diagrams. Turgor pressure or Plasmolysis.
95% H2O
85% H2O
5% H2O
85% H2O
cell
membrane