In the kidney, the efferent arteriole has a smaller diameter than the afferent arteriole, and this will:
A)keep blood pressure high in the glomerulus
B)help provide for efficient filtration
C)both A and B
D)both A and B and will keep RBCs out of the filtrate

Question

Quizplus · Accepted Answer

The smaller diameter of the efferent arteriole helps to maintain high blood pressure in the glomerulus, which is necessary for efficient filtration to occur. This also helps to keep red blood cells out of the filtrate, as they are too large to pass through the glomerular membrane. Thus, both options A and B are correct.

In the Kidney, the Efferent Arteriole Has a Smaller Diameter