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Unformatted text preview: pressure cuff. Pressure and Resistance o Blood pressure fluctuates between 120 mm Hg (systolic) and 80 mm Hg (diastolic) in the aorta. If constriction of blood vessels occurs, resistance to blood flow increases, and blood flow decreases. Pulse Pressure o Pulse pressure is the difference between systolic and diastolic pressure. Pulse pressure increases when stroke volume increases. o A pulse can be detected when large arteries are near the surface of the body. Capillary Exchange o Most exchange across the wall of the capillary is by diffusion. o Blood pressure, capillary permeability, and osmosis affect movement of fluid across the wall of the capillaries. There is a net movement of fluid from the blood into the tissues. The fluid gained by the tissues is removed by the lymphatic system....
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- Fall '10