study guide

Topics: Enzyme, Cell membrane, Cell Pages: 3 (431 words) Published: November 26, 2013
Review for Exam 1
Bio 2234 Fall 2013

1. If you have been keeping up with the material as it is presented you know this stuff. Don’t get overwhelmed by these study points. These are simply to guide you through the large amount of information. Good luck!

2. Know how negative feedback works to maintain homeostasis. Use terms effector, control center stimulus, etc to explain. Using mean arterial pressure describe how a decrease triggers reset back to normal mean arterial pressure.

3. Understand how positive feedback works. Give an example that was discussed in class.

4. Know how end product concentration affects enzyme activity. Can this also be an example of negative feedback?

5. What are the two ways a product may bind to an enzyme and inhibit activity.

6. What is the definition of homeostasis?

7. Know all mechanisms that affect enzyme function. Be able to explain each in a paragraph.

8. What is the function of enzymes in a chemical reaction?

9. What are Isoenzymes? Where are they found?

10. Define the 1st and 2nd law of thermodynamics. What is free energy and how is it affected by endergonic and exergonic reactions?

11. What is the %water in the extracellular and intracellular compartments? Why is water necessary for the body to function properly.

12. What are intrinsic and extrinsic regulatory mechanisms? Give an example of each.

13. What is the fluid mosaic model? What is the function of each component of the model? What determines the flexibility of the cell membrane?

14. What are the types of transport across the cell membrane? Which uses proteins? Which needs energy?

15. For end product feedback, the product stops enzyme activity. Explain the two ways enzymes are inhibited by product.

16. What is the resting membrane potential range of cells

17. Describe the model that describes how an enzyme fits a substrate. Which is the “key” and which is the “lock”. What is this model...
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