Quiz 23 - flow. Water pressure compresses the chest cavity,...

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Question 1 Multiple Choice 0.5 points Which one of the following will increase the partial pressure of oxygen in the alveoli? An increase in alveolar ventilation matched by an increase in metabolism. An increase in metabolism with no change in alveolar ventilation. An increase in alveolar ventilation with no change in metabolism. Breathing air with 15% oxygen at sea level. Breathing air with 1% carbon monoxide. Question 2 Multiple Choice 0.5 points 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? The lumen of the snorkel introduces additional dead space, adding to the residual volume of the airways. Breathing through the mouth introduces more airway resistance than breathing through the nostrils. Breathing through a snorkel decreases the total resistance of the airways to air
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Unformatted text preview: flow. Water pressure compresses the chest cavity, making breathing more difficult. Question 3 Multiple Choice 0.5 points Breath can be held voluntarily for only a limited period of time. Eventually, the respiratory center in the brain will issue powerful commands to resume breathing. Which one of the following chemical properties of the blood is monitored by the respiratory center to stimulate an increase in the rate of breathing? a rise in carbon dioxide concentration a fall in bicarbonate concentration a fall in oxygen concentration a rise in pH Question 4 Multiple Choice 0.5 points In which one of the following situations would you expect hemoglobin to have the lowest binding affinity for oxygen? just below the surface of the skin on a cold day in actively exercising skeletal muscle in resting skeletal muscle in the lung...
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This note was uploaded on 10/25/2010 for the course BISC 220L taught by Professor Herrera,mcclure during the Spring '07 term at USC.

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