ANATOMY
RENAL TRACT AND RETROPERITONEUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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sympathetic control activated
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parasympathetic control activated
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vasodilation
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None of the above
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Detailed explanation-1: -Sympathetic activation rapidly induces vasoconstriction of the arterioles to the glomerulus to reduce GFR and to divert blood away from the kidneys to support other body tissues: the kidneys typically receive 20-25 % of total cardiac output, when this extrinsic regulator is activated, the percentage is much less.
Detailed explanation-2: -If GFR is too high, the absorptive capacity of salt and water by the renal tubules becomes overwhelmed. Autoregulation manages these changes in GFR and RBF. There are two mechanisms by which this occurs. The first is called the myogenic mechanism.
Detailed explanation-3: -An increase in renal arterial pressure (or renal blood flow) causes an increase in GFR. A reduction in renal arterial pressure (or renal blood flow) will have the opposite effect (1).