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← Human Body & HealthA patient's blood pressure drops severely during surgery. Why does the body's compensatory response sometimes fail to restore adequate blood pressure, leading to shock?
A)Epinephrine directly inhibits vasodilation
B)Increased venous return overwhelms the heart
C)Baroreceptor desensitization diminishes vasoconstriction✓
D)Kidney retains excess fluid volume
💡 Explanation
Baroreceptor desensitization causes the compensatory response to fail because prolonged hypotension reduces baroreceptor sensitivity. Therefore, the vasoconstriction reflex is blunted, resulting in inadequate blood pressure, rather than other mechanisms like fluid overload or direct epinephrine inhibition.
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