ANATOMY
RENAL TRACT AND RETROPERITONEUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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regulating radius of afferent arteriole
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regulating radius of efferent arteriole
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increasing blood flow
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regulating radius of all arteries
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Detailed explanation-1: -Increased blood volume and increased blood pressure will increase GFR. Constriction in the afferent arterioles going into the glomerulus and dilation of the efferent arterioles coming out of the glomerulus will decrease GFR. Hydrostatic pressure in the Bowman’s capsule will work to decrease GFR.
Detailed explanation-2: -Afferent arteriole constriction leads to decreased GFR and decreased RPF, resulting in no change in FF. One important function of prostaglandins is to dilate the afferent arteriole.
Detailed explanation-3: -Autoregulation of Glomerular Filtration Rate and Renal Blood Flow. Autoregulation is necessary to prevent changes in GFR and RBF when blood pressure varies abruptly. Two systems are responsible for renal autoregulation: (1) a myogenic mechanism and (2) a tubuloglomerular feedback mechanism.