lecture23_Cardio6

lecture23_Cardio6 - Cardiovascular Physiology VI...

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Cardiovascular Physiology VI Circulation and Blood Pressure (part 3) Reading : chapter 10, pgs 365-380
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Capillary Exchange - exchange of materials between the blood and the interstitial space. - Interstitial fluid takes on the same composition as the arterial blood. Diffusion - substances in the blood move independently of one another down their concentration gradients Exchange - can occur by 1) diffusion , and 2) bulk flow
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Capillary Exchange : (cont.) Diffusion - substances in the blood move independently of one another down their concentration gradients.
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Bulk Flow - - - Capillary Exchange : (cont.) mechanism for maintaining fluid balance between the blood and the extracellular space. pores in capillary walls permit the flow of plasma, but not proteins or blood cells. bulk flow into the tissues is called ultrafiltration. bulk flow into the capillaries is called reabsorption . (4 forces control the direction of flow - next slide)
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capillary blood pressure (P c ) - hydrostatic pressure exerted on the inside of the capillaries. Forces fluid out of the capillaries and into the interstitial fluid. plasma-colloid osmotic pressure ( π p ) - osmotic force pushing water into the capillaries from the interstitial fluid. Controlled by the concentration of protein in the blood plasma. interstitial fluid hydrostatic pressure
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This note was uploaded on 01/29/2012 for the course NPB 101 taught by Professor Fuller,charles/goldberg,jack during the Winter '08 term at UC Davis.

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lecture23_Cardio6 - Cardiovascular Physiology VI...

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