Exam_1_2011Solution - NAME: _________________________...

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Unformatted text preview: NAME: _________________________ Discussion Section(Circle One): M Wed Th Fri Quantitative Engineering Physiology BME 365R (14575, 14580, 14585, 14590): Quiz 1 October 4, 2011 Questions 1-50 are multiple choice. Each question is equally weighted and valued at 2 points. For each question, circle the one answer that you think is most correct. Circle your answer on the Exam sheet AND bubble in your selected answer on the Scantron. Calculators are NOT allowed when working the Exam. 1. Momentum has cardiovascular units of: A. mmHg ml/s B. mmHg/s C. mmHg ml D. mmHg s E. None of the above 2. In the mechanical rotation domain the MKS units for effort are: A. N s B. N rad/s C. N m D. N m rad/s E. None of the above 3. Sleep apnea is often treated by the patient wearing a device that provides a continuous source of positive airway pressure (CPAP). If a machine provides an average airway pressure difference of 5cmH 2 O during an inhalation flow rate of 10 ml/s, the average power flow into the lungs during inhalation is: A. 2 ml/(cm H 2 Os) B. 0.5 cmH 2 O s/ml C. 50 cmH 2 O ml/s D. None of the above 4. If an 100 kg sprinter accelerates at 0.5 m/s 2 at a velocity of 1 m/s, the power going into his/her kinetic energy is: A. 50 W B. 200 W C. 0.005 W D. None of the above 5. If the ion flow into a cell is 2pA (pico-amperes) and the potential difference across the cell membrane is 20 mV (inside less outside), the power into the cell is: A. 10 GW (gigawatt) B. 100 nW (nanowatts) C. 40 fW (femtowatts) D. None of the above 6. If the resting energy expenditure (REE) of an individual is 100W, over a 10 second time period the net energy expended is: A. 10 J B. 100 J C. 1 KJ D. 1 MJ E. None of the above NAME: _________________________ Discussion Section(Circle One): M Wed Th Fri 7. For problem 6 above, select the organ (or tissue mass) listed below which probably used the greatest fraction of the energy expended over the ten-second time period? A. Heart B. Kidney C. Brain D. Adipose E. Skeletal Muscle 8. For problem 6 above, select the organ (or tissue mass) listed below which probably used the greatest energy per unit mass over the ten-second time period? A. Heart B. Kidney C. Brain D. Adipose E. Skeletal Muscle Questions 9-10 refer to an experimental artery that has pressure ( P ) blood flow ( Q ) relationship given by: P = 2 Q 2 where P has units of mmHg while Q has units of ml/s. 9. When the blood flow through the experimental artery is 3ml/s, the resistance to flow in the experimental artery A. 6 mmHg s/ml B. 12 mmHg s/ml C. 1/6 ml/(mmHg s) D. None of the above 10. For the blood flow in problem 9, the power dissipated in the experimental artery is: A. 54 mmHg ml/s B. 108 mmHg ml/s C. 1/4 mmHg ml/s D. None of the above Questions 11-12 refer to an artificial lung that has a pressure ( P ) volume ( V ) relationship given by: V = 2 P 1/2 where P has units of cmH 2 O while...
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This note was uploaded on 12/13/2011 for the course BME 365R taught by Professor Rylander during the Spring '09 term at University of Texas at Austin.

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Exam_1_2011Solution - NAME: _________________________...

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