Quiz 09 Posted Answers

Quiz 09 Posted Answers - e. air is flowing into the lung....

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Quiz 09 Covers lectures 26, 27, 28: Mar 23 (start of Gas Exchange) through Mar 27 (Cellular Defenses) Posted: Friday, March 27, 1 pm Deadline: Wednesday, April 1, 6 am 1. Which one of the following will increase the partial pressure of oxygen in the alveoli, compared to normal, resting conditions? (c) a. An increase in alveolar ventilation matched by an increase in metabolism. b. An increase in metabolism with no change in alveolar ventilation. c. An increase in alveolar ventilation with no change in metabolism. d. Breathing air with 15% oxygen at sea level. e. Breathing air with 1% carbon monoxide. 2. If atmospheric pressure is 760 mm Hg and pressure in the alveolar air is 758 mm Hg, … (e) a. it is the end of normal inspiration and there is no air flow. b. it is the end of normal expiration and there is no air flow. c. the volume of the chest cavity is at its minimum. d. the diaphragm muscle is relaxed.
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Unformatted text preview: e. air is flowing into the lung. 3. In which one of the following situations would you expect hemoglobin to have the lowest binding affinity for oxygen? (a) a. in your thigh muscle after you have been running for a minute b. just below the surface of the skin on a cold day c. in the pulmonary vein d. in the kidney e. in the lung 4. Why must a person floating on the surface of the water and breathing through a snorkel increase tidal volume and/or breathing rate to maintain normal alveolar ventilation? (a) a. The lumen of the snorkel introduces additional dead space, adding to the residual volume of the airways. b. Breathing through the mouth introduces more airway resistance than breathing through the nostrils. c. Breathing through a snorkel decreases the total resistance of the airways to air flow. d. Water pressure compresses the chest cavity, making breathing more difficult....
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This note was uploaded on 07/15/2009 for the course BISC 220 taught by Professor Mcclure during the Spring '09 term at USC.

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