Question

Blo 9 Homework 2 ch.6-10 and 12) 25 points enzymes, energy. Cell resp and Metabolism, Interaction b/w cells, Nervous system, neurons) Fill-in (1 pt per blank) increases the rate of a biochemical reaction and remains unchanged at the end. 2. An axon will depolarize if the membrane potential reaches -60mV following the or intravenous fluid would be given to a patient to reduce edema. 4. Diffusion the entropy of a solution. 5. In terms of net energy loss or gained, Glycolysis is an reaction 6. To form lactic acid from pyruvic acid it is necessary to have 7. The ATP generated in the citric acid cycle is achieved by phosphorylation. occurs when the product of a metabolic pathway binds to an enzyme and decreases enzymatic 9. Addition of phosphate groups to a particular molecule is catalyzed by True/False 0 pts each) Indicate whether the statement is true or false. if true explain why it is true and/or give examples to support it. f e, explain why it is false. 10. The 'Oxidative part of Oxidative phosphorylation creates an H20 gradient that drives the synthesis of ATP 11. The action of acetylcholinesterase prolongs the effect of an action potential.

Answer 1

1.catalyst

2. all or none law

3. hypertonic solution

4. increases

5. exothermic

6. anaerobic condition

7. substrate level phosphorylation

8. feedback inhibition(allosteric regulation)

9. kinases

10. False. In oxidative phosphorylation, H+ gradient is created to synthesize ATP with the help of membrane bound ATP synthase enzyme.

11. False, because the acetylcholinesterase brakes down acetyl choline into acetate and choline. So, acetylcholinesterase reduces the concentration of acetylcholine, i.e. reduces the neurotransmitters, which inturn reduces action potential. Hence, the given statement is false.

12.Local anesthetics act on the voltage-gated sodium channels that conduct electrical impulses and mediate fast depolarization along nerves. Local anesthetics also act on potassium channels, but they block sodium channels more. Due to this no action potential is generated in the pain receptors, and hence no pain senses are trnsmitted to the brain, so, we dot feel the pain.

13.

a. the concentration of ions inside and outside the cell,

b. the permiability of different ions across the membrane,

c. the equilibrium potential of different ions,

d. the Nernst equation and the Gibbs Donnan's equilibrium,

e. the active ion pumps