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Answer to Question #84574 in Human Anatomy and Physiology for Lisa

Question #84574
A competitive inhibitor blocks the effect of ADH (AVP) hormone. The individual has been drinking plenty of water for several days. Which of these will occur?
A. More salt leaves urine
B. less salt leaves urine
c. water permeability of collecting duct increase
d. water permeability of the duct decrease
e. water or salt excretion does not change
Expert's answer

D. water permeability of collecting duct decrease. The ADH hormone causes the exhalation of aquaporins 2 into the membranes of the cells of the distal tubule of the nephron. Therefore, the reabsorption of water from urine increases and urine is dehydrated.

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