What response would correct for a drop in glomerular blood pressure?
A)angiotensin II-mediated inhibition of the adrenal cortex
B)inhibition of osmoreceptors in the brain,leading to decreased thirst
C)dilation of the afferent renal arterioles by angiotensin II
D)inhibition of antidiuretic hormone release by the posterior pituitary gland
E)stimulation of sodium secretion by the distal convoluted tubules

Question

Quizplus · Accepted Answer

The correct response for a drop in glomerular blood pressure is to increase the blood flow to the kidneys, thereby increasing the glomerular filtration rate (GFR). Angiotensin II acts to constrict the efferent renal arterioles, thereby increasing the blood pressure within the glomerulus and increasing the GFR. Option A is incorrect because angiotensin II actually stimulates the adrenal cortex to release aldosterone, which increases sodium reabsorption and therefore increases blood volume and blood pressure. Option B is incorrect because osmoreceptors in the brain regulate thirst according to changes in blood osmolality, not blood pressure. Option D is incorrect because antidiuretic hormone (ADH) actually acts to increase water reabsorption and therefore increase blood volume and blood pressure. Option E is incorrect because stimulation of sodium secretion by the distal convoluted tubules would decrease blood volume and blood pressure.

What Response Would Correct for a Drop in Glomerular Blood