Which pressure difference contributes to net filtration pressure by favoring filtration across capillaries?

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Multiple Choice

Which pressure difference contributes to net filtration pressure by favoring filtration across capillaries?

Explanation:
Filtration across capillaries is driven by hydrostatic forces that push fluid outward and is opposed by osmotic (colloid) forces that pull fluid inward. The outward push comes from capillary hydrostatic pressure, and the fluid moves out when this pressure exceeds the interstitial hydrostatic pressure. So the pressure difference that favors filtration is the capillary hydrostatic pressure minus the interstitial hydrostatic pressure. The osmotic forces (capillary oncotic pressure minus interstitial oncotic pressure) mainly oppose filtration by pulling water back into the capillary. In short, hydrostatic pressure differences across the capillary wall promote filtration, while oncotic differences oppose it.

Filtration across capillaries is driven by hydrostatic forces that push fluid outward and is opposed by osmotic (colloid) forces that pull fluid inward. The outward push comes from capillary hydrostatic pressure, and the fluid moves out when this pressure exceeds the interstitial hydrostatic pressure. So the pressure difference that favors filtration is the capillary hydrostatic pressure minus the interstitial hydrostatic pressure. The osmotic forces (capillary oncotic pressure minus interstitial oncotic pressure) mainly oppose filtration by pulling water back into the capillary. In short, hydrostatic pressure differences across the capillary wall promote filtration, while oncotic differences oppose it.

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