intracellular fluid (ICF)
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Terms in this set (22)
capillary hydrostatic pressurethe movement of fluid out of the arteriolar end of the capillary and into the interstitial spacecapillary oncotic pressure(from plasma proteins); at the venous end, it attracts water back into the vascular spaceinterstitial hydrostatic pressurethe movement of fluid and proteins from the interstitial space into the capillary (lymphatics)interstitial oncotic (osmotic) pressurethe movement of fluid from the capillary into the interstitial spacenormal ICF/ECF osmotic pressures280 to 294 mOsm; water is equally distributed between the interstitial fluid and intracellular compartmentsosmotic forces: Na+ECF osmotic force; more responsive to changes in osmolality than ICFosmotic forces: K+ICF osmotic forceADH (antidiuretic hormone) secreted in response toincreased plasma osmolality, decreased blood volume, or decreased blood pressureosmoreceptors in hypothalamus stimulated byincreasing osmolality, causing thirstvolume sensitive receptors (R+L atria, thoracic vessels) & barorecptors (aorta, PA, and carotid sinus)stimulate ADH releaseedemaexcessive fluid accumulation in the interstitial spacesedema caused byincreased capillary hydrostatic pressure - due to venous obstruction, Na+ and H20 retention, thrombophlebitis, hepatic obstruction, restrictive clothing, prolonged standing lowered plasma oncotic pressure - due to liver disease, protein calorie malnutrition, kidney disease, excess wound drainage, burns increased capillary membrane permeability - trauma, burns, neoplasm, allergic reactions lymphatic channel obstruction - blocked lymphatic channels lead to lymphedema