Question at position 11 Which of the following BEST describes the autoregulatory renal response to an INCREASE in mean arterial pressure?Vasoconstriction of the afferent arteriole, leading to a decreased glomerular filtration rateVasodilation of the afferent arteriole, leading to a decreased glomerular filtration rateVasodilation of the efferent arteriole, leading to a decreased glomerular filtration rateVasoconstriction of the afferent arteriole, leading to an increased glomerular filtration rate单项选择题

A

Vasoconstriction of the afferent arteriole, leading to a decreased glomerular filtration rate

B

Vasodilation of the afferent arteriole, leading to a decreased glomerular filtration rate

C

Vasodilation of the efferent arteriole, leading to a decreased glomerular filtration rate

D

Vasoconstriction of the afferent arteriole, leading to an increased glomerular filtration rate

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Which of the following mechanisms directly regulates the constriction or dilation of the afferent arteriole to control GFR?

Question at position 19 What is the primary function of the myogenic mechanism in regulating renal blood flow?To increase sympathetic nervous system activity in the kidneysTo regulate blood flow within the kidney by contracting or relaxing smooth muscle cellsTo modulate the release of the atrial natriuretic peptide (ANP)To dilate the efferent arteriole in response to increased blood pressureTo release renin in response to decreased blood pressure

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