Biology Unit 03: Cell Homeostasis Review

1. 1. What type of biomolecules are embedded in cell membranes that allow large or charged particles to pass through them?
2. 2. Describe diffusion through a cell membrane?
3. 3. Describe facilitated diffusion.
4. 4. Describe active transport.
5. 5. What kind of biomolecule makes up the bilayer in the cell membrane?
6. 6. Describe osmosis.
   1. a. Describe the net flow of water into or out of a cell in the following solutions: isotonic, hypertonic, hypotonic.
   2. b. What is osmotic pressure? How does it relate to the solutions in the question above?
7. 7. What type of transport results in concentrations of solutes that would not be possible without ATP?
8. 8. How does the cell membrane help maintain homeostasis within a cell?
9. 9. What happens in exocitosis and endocitosis? Are they active transport, facilitated diffusion, or passive transport?