How does the vessel diameter of the afferent arteriole change in order to decrease glomerular hydrostatic pressure (GHP) and restore the glomerular filtration rate (GFR) to normal?
A) The afferent arteriole has no effect on GHP and GFR.
B) The afferent arteriole will vasoconstrict.
C) The afferent arteriole will vasodilate.
D) The afferent arteriole will vasoconstrict, then vasodilate.
Answer: B
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