day? The horse\'s blood is composed of 70% plasma and 30% cells. In other words,
ID: 265783 • Letter: D
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day? The horse's blood is composed of 70% plasma and 30% cells. In other words, the horse's hematocrit is 30%. What is the renal blood flow, in L/day? If renal blood flow is 20% of the horses cardiac output, what is the cardiac output, in L/day? b. C. Silverthorn 19.29 5. The following table shows the hydrostatic and colloid osmotic pressures across a capillary bed in a 56 year old male patient Arterial End 33 mmHg Colloid Osmotic Pressure (25 mmHg Venous End 26 mmHg 15 mmHg Hydrostatic pressure (PH) a. At the venous end, what is the net pressure? Will there be filtration or absorption at this end? At the arterial, what is the net pressure? Will thre be filtration or absorption at this end? b. c. Suppose the man develops advanced liver disease and loses the inability to synthesize plasma proteins. What will happen to the colloid osmotic pressure in his blood? What wil happen to the volume of fluid that is filtered out of his capillaries into the lymph each day?Explanation / Answer
Capillary hydrostatic pressure is the force exerted due to pumping action of heart by blood/fluid against the capillary wall. It helps in the movement of fluid between capillaries and the interstitial fluid. Normally highest capillary hydrostatic pressure is observed at the arteriar end of the capillary and lowest pressure is observed at the venus end.
Colloid osmotic pressure, is a form of osmotic pressure exerted by plasma proteins (mostly by albumin) in a blood vessel's plasma that usually tends to pull water into the circulatory system and thus prevents fluid from leaving. It is the opposing force to hydrostatic pressure.
The net filtration pressure represents the interaction of the hydrostatic and osmotic pressures, driving fluid out of the capillary. It is equal to the difference between the hydrostatic pressure and osmotic pressure.
a. So at the venous end the net pressure would be 11 mmHg. This 11 mm Hg would drive a net movement of fluid out of the capillary at the arterial end. So there will be filtration and not absorption.
b. At the arterial end also there weill be a filtration with net pressure of 8mm Hg.
c. As plasma proteins are responsible for generating colloidal osmotic pressure there will be less pulling of water. So colloidal osmotic pressure will fall. So there will be more filtration and lymphs may become swollen due to increased accumulation of water
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