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bisc307 exam 3 %28sp. 05%2C byerly%29

# bisc307 exam 3 %28sp. 05%2C byerly%29 - Third Exam BISC...

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NAME ____________________________________ 1. (6 points) A blood vessel runs from A to B. At B it splits into two smaller vessels, which rejoin at C. The resistance of the vessel from A to B is 5 , while the resistances of the two smaller vessels are 15 and 30 . The blood pressure at A is 90 mmHg and that at C is 75 mmHg. A. What is the blood flow through the 5 vessel? B. What is the blood pressure at B? C. What is the blood flow through the 30 vessel? 1/R = 1/(15 ) + 1/(30 ); so R = 10 A. Q = (15 mmHg)/(15 ) = 1 liter/min B. P B = 90 mmHg – (1 l/min)x(5 ) = 85 mmHg C. Q = (10 mmHg)/(30 ) = 1/3 liter/min 2. (4 points) Blood vessel 1 has twice the diameter of vessel 2. Both vessels have the same length and drop of pressure from one end to the other. A. How does the blood flow through vessel 1 (Q 1 ) compare to that through vessel 2 (Q 2 )? B. How does the average velocity of the blood in vessel 1 (V 1 ) compare to that in vessel 2 (V 2 )? R = k r
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bisc307 exam 3 %28sp. 05%2C byerly%29 - Third Exam BISC...

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