The physiology instructor explains that the nephrons are fragile and require a constant supply of blood and oxygen. What compensatory mechanisms work to maintain this supply?
A) The renin–angiotensin system, causing vasoconstriction
B) Baroreceptor monitoring of the renal artery
C) Increased sweating when total water volume becomes too great
D) Antidiuretic hormone (ADH) release in response to increased blood volume or decreased osmolarity
A
Feedback:
The renin–angiotensin system causes vasoconstriction to improve blood flow to the fragile nephrons. Baroreceptors are not found in the renal artery. Increased sweating is not a reflex reaction to increased total body water. ADH is released in response to decreased blood volume and increased osmolarity.
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