Increased ADH Secretion is Likely After

Question

Increased ADH secretion is likely after
A)drinking lots of pure water.
B)sweating-induced dehydration increases plasma osmolarity.
C)ingestion of ethanol (drinking alcoholic drinks).
D)eating a small sugary snack.
E)blood pressure is abnormally high.

Accepted Answer

ADH secretion is stimulated by an increase in plasma osmolarity, which occurs during dehydration when there is less water in the body. This is likely the case after sweating-induced dehydration. Drinking lots of pure water (A) would decrease plasma osmolarity and inhibit ADH secretion. Ingesting ethanol (C) may inhibit ADH secretion and lead to dehydration, but it would not increase ADH secretion. Eating a small sugary snack (D) would have no effect on ADH secretion. High blood pressure (E) would stimulate atrial natriuretic peptide (ANP) secretion, which would inhibit ADH secretion.