Blood flowing through the efferent arteriole
A) Has the same concentration of small ions as afferent arteriolar blood but higher
protein concentration
B) Is the same as blood everywhere else in the body
C) Is concentrated in all respects due to extraction of water into the ultrafiltrate
D) Has a higher hydrostatic pressure than afferent arteriolar blood
E) Has the same hydrostatic pressure as afferent ateriolar blood because the efferent
arteriole constricts

Question

Quizplus · Accepted Answer

Blood flowing through the efferent arteriole has the same concentration of small ions as afferent arteriolar blood due to filtration at the glomerulus being non-selective for small molecules. However, it has a higher protein concentration because proteins are generally too large to pass through the filtration barrier, concentrating them in the blood that remains.

Blood Flowing Through the Efferent Arteriole