Baroreceptor Reflex and Blood Pressure Regulation
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Baroreceptors in major vessels detect blood pressure changes and signal the brainstem to adjust heart rate and vessel diameter, working alongside the hormonal pathway, per Bio 2937.
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A sudden pressure drop triggers baroreceptor signaling that raises heart rate within seconds.
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The baroreceptor reflex acts on a seconds-to-minutes scale, while the hormonal pathway, per Bio 2937, sustains pressure longer.