Under normal conditions an increase in systemic blood pressu

Under normal conditions, an increase in systemic blood pressure will lead to...

a) a vasodilation of the afferent arteriole to increase glomerular blood pressure

b) a vasoconstriction of the afferent arteriole to increase glomerular blood pressure.

c) a vasodilation of the afferent arteriole to keep glomerular blood pressure constant

d) a vasoconstriction of the afferent arteriole to keep glomerular blood pressure constant

e) none are correct

Solution

b.a vasoconstriction of the afferent arteriole to keep glomerular blood pressure constant- in normal cases. it is called autoregulation and it prevents the pressure on the glomerular capillaries and increase of glomerular filtration rate.