At the arteriole end of a capillary the
A) hydrostatic pressure gradient across the capillary wall is greater than the colloid osmotic pressure gradient.
B) colloid osmotic pressure of the interstitial fluid is greater than the colloid osmotic pressure of the blood.
C) hydrostatic pressure of the interstitial fluid is greater than hydrostatic pressure of the blood.
D) hydrostatic pressure gradient across the capillary wall is greater than the colloid osmotic pressure gradient and colloid osmotic pressure of the interstitial fluid is greater than the colloid osmotic pressure of the blood.
E) colloid osmotic pressure of the interstitial fluid is greater than the colloid osmotic pressure of the blood and hydrostatic pressure of the interstitial fluid is greater than hydrostatic pressure of the blood.

Question

Quizplus · Accepted Answer

At the arteriole end of a capillary, the hydrostatic pressure exerted by the blood is higher than the colloid osmotic pressure, which drives the movement of fluid out of the capillaries into the interstitial space. This is a fundamental aspect of the Starling equation, describing fluid exchange across capillary walls.

At the Arteriole End of a Capillary the