If there is an increase in systemic blood pressure, the resulting stretch of afferent arterioles results in reflexive
A. vasodilation of afferent arterioles to keep GFR normal.
B. vasodilation of efferent arterioles to lower GFR.
C. vasoconstriction of afferent arterioles to keep GFR normal.
D. vasoconstriction of efferent arterioles to raise GFR.
Answer: C
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