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6) A decrease in MAP is detected by baroreceptors, which initiate a reflexive increase in sympathetic activity....

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Medical Sciences

6) A decrease in MAP is detected by baroreceptors, whichinitiate a reflexive increase in sympathetic
activity. This results in generalized vasoconstriction ofarterioles throughout the body. Among the
arterioles that constrict are the afferent arterioles of thekidneys (which are innervated to a much
greater extent than the efferent arterioles). What effect does thishave on GFR? And how does this
counteract the drop in blood pressure? What is the consequence ofsympathetic stimulation of the beta-
1 receptors on JG cells?

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3.9 Ratings (719 Votes)
the afferent arteriole has more and larger diameter than the efferent arterioles So there is high resistance as the blood flows from a wider vessel to a narrower one the constriction of the afferent arteriole decreases and reduces blood flow and filtration pressure that is glomerular filtration rate where as    See Answer
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