Medicine, 13.12.2019 23:31 floreschachi7506
The net filtration across relaxed skeletal muscle capillaries is about 0.005 ml/min per 100 g of tissue. assume the following values: the density of muscle is 1.08 g/cm3; the length of the capillaries is 500 μm and their cross-sectional density is 250 capillaries/mm2. their average radius is 4 μm. pressure at the arteriolar end of the capillary is 40 mm hg and it decays linearly to 15 mm hg at the venule end. the oncotic pressure of plasma is 25 mm hg. interstitial fluid pressure in relaxed muscle is -1 mm hg and intersitial fluid oncotic pressure is 5 mm hg
a. calculate the surface area of the capillaries per 100 g of muscle. (hint: calculate the mass of muscle 250 mm2 in cross-section and 500 um long)
b. does the capillary filter fluid along its entire length, or does it reabsorb fluid at the venule end? support your answer with calculations based on the givern information.
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