FA03 midterm I key

# FA03 midterm I key - BIPN 102 Mammalian Physiology II Fall...

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BIPN 102, Mammalian Physiology II Name:__ANSWER KEY _____ Fall 2003, 1 st Midterm Exam. UC ID #:______________________ October 24, 2003 Please be Concise and Precise! 1. (10 points) Paul Bunyan has a larger than normal tidal volume of 800 mL and a respiratory rate of 13 breaths/min. His respiratory rate increases to 18 breaths/min after a little mouse scares him. Assuming his dead space is 200 mL: A. Calculate his total pulmonary ventilation before and after he saw the mouse: 4 pts V T = 800 ml x 13/min = 10.4 L/min and V T = 800 x 18 = 14.4 L/min B. Calculate his alveolar ventilation before and after he saw the mouse: 4 pts V A = (V T – V D ) x f = 600 x 13 = 7.8 L/min and V A = 600 x 18 = 10.8 L/min C. How will his alveolar PO2 and PCO2 change after he saw the mouse (increase, decrease)? 2 pts P A O 2 will increase, P A CO 2 will decrease 2. (12 points) You are doing standard respiratory function tests with a spirometer in a normal subject. For each of the conditions below: (1) indicate which respiratory muscles, if any, are contracting, and (2) write the relative magnitudes, in increasing order, of the intrapleural (P IP ), atmospheric (P A TM ) and alveolar (P A ) pressures. Use larger than (>), smaller than (<) or equal to (=) symbols. A. At the end of a forced inspiration:

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FA03 midterm I key - BIPN 102 Mammalian Physiology II Fall...

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