Stimulation of the macula densa cells
A)results in vasodilation of the afferent arteriole
B)results in vasoconstriction of the afferent arteriole
C)increases GFR
D)causes all of the above
E)causes only a and c

Question

Quizplus · Accepted Answer

Stimulation of the macula densa cells results in vasoconstriction of the afferent arteriole, which in turn reduces the pressure and filtration rate in the glomerulus. Therefore, option B is correct. Option A is incorrect as it represents vasodilation, the opposite of the actual response. Option C is incorrect as it represents an increased GFR which occurs with the dilation of the afferent arteriole. Option D and E are also incorrect as options A and C are not valid.

Stimulation of the Macula Densa Cells