Exam_1_2010Solutions - NAME Discussion Section(Circle One M Wed(10:00 Wed(12:00 Fri Quantitative Engineering Physiology BME 365R(14170 14175 14180

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NAME: _________________________ Discussion Section(Circle One): M Wed(10:00) Wed(12:00) Fri Quantitative Engineering Physiology BME 365R (14170, 14175, 14180, 14185): Quiz 1 October 5, 2010 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. If the flow through a segment of the aorta is 2.5 liters/sec and the pressure drop is 15mmHg, the resistance of the aorta segment is: A. 6 mmHg · s/ml B. 37.5 mmHg · liters/s C. 6000 mmHg · s/ml D. 0.00012 mmHg · s/ml E. None of the above 2. Consider an arteriole that is 3mm long and has an inner diameter of 0.0300mm. If during intense physical activity the arteriole diameter expands to 0.0315 mm, the resistance to blood flow will: A. Decrease by approximately 5% B. Increase by approximately 10% C. Decrease by approximately 15% D. Decrease by approximately 20% 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 of 10cmH 2 O during an inhalation flow rate of 30 ml/s, the average power flow into the lungs during inhalation is: A. 3 ml/(cm · H 2 Os) B. 0.33 cmH 2 O · s/ml C. 300 cmH 2 O · ml/s D. None of the above 4. If an 100 kg sprinter accelerates at 1.0 m/s 2 at a velocity of 1 m/s, the power going into his/her kinetic energy is: A. 1 W B. 0.01 W C. 100 W D. None of the above 5. If the ion flow into a cell is 3pA (pico-amperes) and the potential difference across the cell membrane is 40 mV (inside less outside), the power into the cell is: A. 120 GW (gigawatt) B. 120 nW (nanowatts) C. 120 fW (femtowatts) D. None of the above 6. If the resting energy expenditure (REE) of an individual is 100W, over a one-hour time period the net energy expended is: A. 100 J B. 6000 J C. 360,000J D. 3.6 MJ E. None of the above
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NAME: _________________________ Discussion Section(Circle One): M Wed(10:00) Wed(12:00) Fri 7. For problem 6 above, select the organ listed or tissue mass below which probably used the least fraction of the energy expended over the five-hour time period? A. Heart B. Kidney C. Brain D. Adipose E. Skeletal Muscle 8. In hydraulics, the Effort-Flow-Displacement-Momentum (EFDM) MKS units of momentum are: A. Pascals B. Pascals/sec C. Pascals · sec D. Pascals · m 3 s E. None of the above 9. When the left ventricle of the heart ejects blood, the aorta expands 2ml for a pressure increase of 50mmHg, the estimated compliance of the aorta is: A. 25 mmHg/ml B. 0.04 ml/mmHg C. 100 ml · mmHg D. None of the above 10. If a lung expands 80ml for a change in air pressure of 20 cmH 2 O, what is the capacitance of the lung? A.
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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_2010Solutions - NAME Discussion Section(Circle One M Wed(10:00 Wed(12:00 Fri Quantitative Engineering Physiology BME 365R(14170 14175 14180

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