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Exam_1_2011Solution

# Exam_1_2011Solution - NAME Discussion Section(Circle One M...

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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: 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: 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: 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:

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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? 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? Questions 9-10 refer to an experimental artery that has pressure ( Δ P ) –blood flow ( Q ) relationship given by: Δ P = 2 Q 2 where Δ 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
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