General+Biology


 * Movement Through Membranes **

//Quiz Review Questions:// 1. What is happening during diffusion? 2. What two factors determine whether diffusion will happen or not? 3. Compare and contrast osmosis and diffusion. 4. Why is osmotic pressure a serious problem for a cell? 5. What are two solutions that some cells have for the problem in the above question? 6. In the process referred to as facilitated diffusion, what is the kind of molecule that does the facilitating? 7. What are the two major differences between active transport and diffusion? 8. Describe endocytosis. 9. In addition to endocytosis and excytosis, what is another way for substances to move through a membrance against the gradient?