lecture 14 cardiovascular 2 sq key

lecture 14 cardiovascular 2 sq key - Short Answers to...

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Short Answers to Lecture 14 Study Questions 1. a. Write the the formula that relates pressure difference, flow and resistance for a hydrostatic system (let’s call it Ohm’s Law) Pressure = Flow x Resistance (like V = IR) Flow = Pressure x (1/Resistance) Resistance = Pressure/Flow b. Write Ohm’s Law for to the distribution of blood flow among tissues in the systemic circulation. F i = P x (1/R i ) for the ith tissue c. Write Ohm’s Law for mean arterial pressure as a function of total peripheral resistance and cardiac output. MAP = CO x TPR 2. a. Explain why it is important for flow through capillaries to be slow. Exchange of substances between capillaries and tissues depends on diffusion, so the blood needs to spend enough time in a capillary for diffusion over the distance between capillaries and cells to take place. b. Explain why flow through capillaries is slow. Each arteriole branches into many capillaries, and the sum of flows through the capillaries equals the flow through the arteriole (Kirchoff’s current law). c. What is the approximate inside diameter of a capillary? Why would a capillary of 1/10
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lecture 14 cardiovascular 2 sq key - Short Answers to...

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