PSL301H1 Chapter Notes -Internal Jugular Vein, Heart Valve, Subclavian Vein
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PSL301H1 Full Course Notes
Verified Note
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Document Summary
Regulation of cardiovascular function: baroreceptor reflex, increased cardiac output and peripheral resistance increases mean arterial pressure. Baroreceptor quickly returns pressure to normal: exchange at the capillaries, capillary density is directly related to the metabolic activity of tissue"s cells. Higher metabolic rate need more nutrients and oxygen: higher capillary network density, composed of single layer of endothelial cells, supported by basal lamina. Narrow diameter, forcing rbc into single file. Cell junctions between endothelial cells vary, determine leakiness of capillary: most common capillaries are continuous capillaries. Endothelial cells joined to each other with leaky junctions. Found in muscle, neural and connective tissue. Allow high volumes of fluid to pass quickly between plasma and interstitial fluid: primarily in intestine and kidneys absorptive transporting epithelia, sinusoids. Found in marrow, liver and spleen do not have capillaries: found in areas where blood cells and plasma proteins need to cross endothelium to enter blood. Up to five times wider than a capillary.
