The baroreceptor reflexes affect sodium balance by
A)causing release of renin
B)causing the release of vasopressin
C)lowering GFR through vasoconstriction of afferent arterioles
D)lowering GFR through vasodilation of afferent arterioles
E)none of the above

Question

Quizplus · Accepted Answer

The baroreceptor reflexes activate the sympathetic nervous system, which causes vasoconstriction of afferent arterioles leading to a decrease in glomerular filtration rate (GFR) and subsequently reduces the excretion of sodium. This is achieved by the release of renin from the juxtaglomerular cells in the kidneys, which activates the renin-angiotensin-aldosterone system (RAAS) that increases sodium reabsorption in the proximal tubule. The release of vasopressin, which regulates water reabsorption, is not directly influenced by the baroreceptor reflexes.

The Baroreceptor Reflexes Affect Sodium Balance by