Baroreceptors primarily sense changes in which parameter?

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Multiple Choice

Baroreceptors primarily sense changes in which parameter?

Baroreceptors monitor how much the arterial walls are stretched, which directly reflects arterial pressure. Located in the carotid sinus and aortic arch, these stretch-sensitive receptors increase their firing when stretch (and thus pressure) rises, signaling the brainstem to reduce heart rate and dilate vessels to lower BP. When pressure falls and the walls stretch less, firing decreases, triggering sympathetic activity to raise BP. They don’t directly sense oxygen, glucose, or pH; those are detected by other receptors.

Baroreceptors monitor how much the arterial walls are stretched, which directly reflects arterial pressure. Located in the carotid sinus and aortic arch, these stretch-sensitive receptors increase their firing when stretch (and thus pressure) rises, signaling the brainstem to reduce heart rate and dilate vessels to lower BP. When pressure falls and the walls stretch less, firing decreases, triggering sympathetic activity to raise BP. They don’t directly sense oxygen, glucose, or pH; those are detected by other receptors.

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