GENERAL HISTOLOGY

VASCULAR

TYPES OF ARTERIES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What causes the filtration of plasma out of the capillaries into the tissues?
A
high pressure in venules
B
osmosis
C
diffusion
D
high pressure in aterioles
Explanation: 

Detailed explanation-1: -CHP is the force that drives fluid out of capillaries and into the tissues. As fluid exits a capillary and moves into tissues, the hydrostatic pressure in the interstitial fluid correspondingly rises. This opposing hydrostatic pressure is called the interstitial fluid hydrostatic pressure (IFHP).

Detailed explanation-2: -Glomerular blood hydrostatic pressure (GBHP) promotes filtration-it pushes water and solutes in blood plasma through the glomerular filter. GBHP is the blood pressure in glomerular capillaries, which is about 55mm Hg. 2.

Detailed explanation-3: -The hydrostatic pressure is 32 mmHg at the arterial end of capillary (Phc, a) and 15 mmHg at the venous end (Phc, b). Because of the gradient of the hydrostatic pressure along the capillary, filtration usually occurs at the arterial end of the capillary and reabsorption at its venous end.

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