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B. It hyperpolarizes the membrane C. t changs he membrane potenatal suh ht voltage-gated Kchambed Na channels are D. It releases calcium from intracellular stores 36. Compared to the cy toplasm, which of the following is generally true about the lumen of the endoplasmie reticulum in our cells? A. It has a more redacing environment B. It bas a moch higher calcium ion concentration. C. It has a higher density of ribosomes. D. All of the above. 37. Myelin is essential for rapid conduction of axon potentials because... A.İt acts as a diffusion barrier to keep sodium channels atthe node ofRanier. B. it insulates the axon to prevent leakage of current C. it is necessary for saltatory conduction D all of the above. 38. Which molecular famllies participate in vesicle fusion with target membranes A. Ran GTPases. B. Rab GTPases C. SNARES D. A and Conly. E. B and C only 39. Transduction in olfactory and visual systems is distinct in that. A activation of olfactory receptors depolarizes the memwbrane while activation of visual receptors hyperpolarizes the B. activation of olfactory receptors hyperpolarizes the membrane while activation of visual receptors depolarizes the C. cyclic nucleotides are involved in visual transduction but not olfactory. D. Offactory is G-protein coupled receptor mediated wbile visual is mediated by receptor tyrosine knases 40. NH2 This molecule is... A. NADPH B. Acetylcholine C. Glutamate D. cAMP E. ATP 41. The size of a typical mitochondrion would be approximately... A. 50 nm B500nm C. 100 am D. 500 pam 42. In the following schematic diagram depieting the formation of vesicular tubular clusters between the ER and the CGN, what major coat proteins are indicated by 1 and 2, respectively?

Answer 1

36. All of the above

37. All of the above

38. Snarls

39. Olfactory is g protein coupled receptors, while visual is tyrosine kinases.