Thirst is
A) controlled by centers in the hypothalamus.
B) triggered by decreased osmolarity.
C) relieved only when plasma osmolarity is increased.
D) controlled by centers in the hypothalamus and triggered by increased osmolarity.
E) controlled by centers in the hypothalamus, triggered by increased osmolarity, and relieved only when plasma osmolarity is decreased.

Question

Quizplus · Accepted Answer

Thirst is controlled by centers in the hypothalamus and triggered by increased osmolarity. Thirst is relieved when adequate fluid intake reduces the osmolarity of the plasma, but it is not necessarily only relieved when plasma osmolarity is decreased. Therefore, choice D is the best answer.

Thirst Is