The baroreceptor reflex on standing
Standing up quickly briefly lowers blood pressure. How does the baroreceptor reflex respond?
Answer D: explanation for every choice
A
Increased vagal activity is the response to high blood pressure.
B
Low blood pressure tends to increase renin release.
C
Dilating arterioles would lower blood pressure further.
D
Correct. Less stretch on carotid and aortic baroreceptors increases sympathetic activity and reduces parasympathetic activity.
TakeawayLow pressure → less baroreceptor firing → more sympathetic tone.
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Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID bb142.