45. Ref er to the accompanying figure. Reabsorption of water occurs at the point

Question

45. Ref er to the accompanying figure. Reabsorption of water occurs at the point(s) labeled as a. 3 and 9 b. 5 and 8 c. 6 and 10. d. 8 and 10. e. only 10. Figure 41-1 1 4 2 8 7 46. Refer to the accompanying figure. The absence of structures represented by label 6 would result in: a. increased speed of impulse transmission b. decreased speed of impulse transmission c. enhanced saltatory conduction d. complete loss of impulse transmission e. complete loss of neurotransmitter release 47. The secretion of which hormone decreases when calcium blood levels increase? a. calcitonin b. parathyroid hormone c. thyroid hormone d. epinephrine e. norepinephrine Cengage Leaming Testing, Powered by Cognera

Explanation / Answer

45-Resorption of water occurs at collecting duct(10) and distal tubule(8)

46- label 6 indicates myelin sheath which causes increased speed of impulse transmission.In case of unmyelinated neurons, there is decreased speed of impulse transmission.

47-Secretion of parathormone decreases when calcium levels in blood increases.

Actually parathormone levels increase in conditions of low calcium levels and causes normal levels.

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