Substances tend to leave the bloodstream at the arterial end of the capillary because ________.
A) osmotic pressure is higher than blood pressure at the arterial end of the capillary
B) osmotic pressure is higher than blood pressure at the venule end of the capillary
C) blood pressure is higher than osmotic pressure at the arterial end of the capillary
D) blood pressure is higher than osmotic pressure at the venule end of the capillary
E) interstitial pressure is higher than osmotic pressure at the arterial end of the capillary

Question

Quizplus · Accepted Answer

The higher blood pressure at the arterial end of the capillary pushes substances out of the capillary into the surrounding tissues. Osmotic pressure does play a role in this process, but it is not the primary driving force.

Substances Tend to Leave the Bloodstream at the Arterial End