One way that substances move between blood and interstitial fluid is by
A) alternatively breaking and regenerating membranes of cells lining capillaries.
B) osmosis.
C) pressure-driven flow through clefts between the epithelial cells of the capillary wall.
D) active transport utilizing ATP.

Question

Quizplus · Accepted Answer

Substances move between blood and interstitial fluid by pressure-driven flow through clefts between the epithelial cells of the capillary wall. This is known as filtration or reabsorption, and it occurs due to differences in pressure between the blood and interstitial fluid. Osmosis and active transport can also play a role in substance movement, but they are not the main mechanisms for movement across the capillary wall. Breaking and regenerating membranes of cells lining capillaries is not a process that occurs in the body.

One Way That Substances Move Between Blood and Interstitial Fluid