What causes the blood’s osmotic pressure to be greater than the osmotic pres- sure of the surrounding interstitial fluid that is outside of the capillaries? A. there is a higher concentration of sodium and chloride ions in the blood than the interstitial fluid. B. there is a higher concentration of water in the blood than in the interstitial fluid. C. the plasma proteins in blood. D. the hydrostatic pressure produced by the heart’s contractions.
Option C. Plasma proteins in blood causes the blood’s osmotic pressure to be greater than the osmotic pres- sure of the surrounding interstitial fluid that is outside of the capillaries.
