BIO SCI E182 Lecture Notes - Osmotic Concentration, Tonicity, Hemoglobin
2 Mar 2014
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Document Summary
5 l/min is the typical cardiac output leaving the left ventricle and going to the rest of the body. Blood flow distribution will change with demand (fig 15-12 shows at rest) Can have increase in one branch with decrease in another. Different parts of the body are different sizes, so different amount of blood needed i. e. liver and digestive tract require the most blood (1. 35 l/min) Neurons require constant supply of oxygen and glucose; sensitive to decreases in oxygen and glucose. Brain function diminishes almost immediately without oxygen or glucose (damage may occur within minutes) The brain consumes a large fraction of the total body glucose consumption (~50%); high consumption organ. Total cardiac output is distributed among branches distribution can change with changing resistance in different branches. The downstream vessels must have the same flow rate as the upstream flow rate if blood is not disappearing or changing in volume [blood flow through four identical vessels (a-d) is equal.
