Which of the following is involved in autoregulation of the GFR?
A) a myogenic mechanism in which the afferent arteriole automatically constricts when it is stretched
B) a tubulo-glomerular feedback mechanism in which vasoactive chemicals released from the juxtaglomerular apparatus bring about afferent arteriolar vasoconstriction
C) sympathetically induced vasoconstriction of the afferent arterioles
D) a myogenic mechanism in which the afferent arteriole automatically constricts when it is stretched, and a tubulo-glomerular feedback mechanism in which vasoactive chemicals released from the juxtaglomerular apparatus bring about afferent arteriolar vasoconstriction
E) none of these
Correct Answer:
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