Which of the following will occur if the sympathetic controls are activated?
A. The afferent arteriole will constrict or dilate, depending on whether blood flow to the glomerulus needs to be increased or decreased to keep GFR in the normal range.
B. The renal artery and other arteries in the kidney will constrict, and GFR will drop to zero.
C. The afferent arteriole will dilate and the efferent arteriole will constrict to increase GFR.
D. No changes to the blood flow patterns or GFR occur when this type of control is initiated.