Vasopressin
A) secretion is stimulated by a water deficit.
B) increases the permeability of the distal and collecting tubules to water.
C) increases the permeability of the late portion of the collecting tubule to urea.
D) both (a) and (b) above.
E) all of these answers.

Question

Quizplus · Accepted Answer

Vasopressin, also known as antidiuretic hormone (ADH), is secreted in response to a water deficit to conserve water (A). It increases the permeability of the distal and collecting tubules to water, allowing more water to be reabsorbed (B). It also increases the permeability of the late portion of the collecting tubule to urea, facilitating urea reabsorption and contributing to the concentration of urine (C).