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← Human Body & HealthWhich mechanical limitation results when systemic vascular resistance severely drops suddenly?
A)Reduced mean arterial pressure (MAP)✓
B)Increased end-systolic volume (ESV)
C)Elevated ejection fraction fraction (EEF)
D)Decreased baroreceptor reflex activation
💡 Explanation
A sudden drop in systemic vascular resistance causes a decrease in the mean arterial pressure because the heart's cardiac output cannot compensate fast enough. This represents circulatory shock; therefore, the blood pressure drops sharply rather than increasing or staying constant.
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