A) ADH
B) STH
C) ACTH
D) TTH
Correct Answer: A
Solution :
Vasopressin or ADH (antidiuretic hormone) is secreted by posterior pituitary. It works by altering the permeability to water of the collecting ducts. In the presence of ADH, the water permeability of collecting ducts increases and thus, water, by simple osmosis, leaves the collecting ducts. This results in the production of a small volume of highly concentrated urine.
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