Which Correctly Describes the Cause of the Increase in Alveolar

question 56

Multiple Choice

Which correctly describes the cause of the increase in alveolar ventilation that occurs when a person ascends to high altitude?

• A)The decrease in PCO₂ of inspired air decreases alveolar PCO₂,stimulating the peripheral chemoreceptors.
• B)The decrease in PCO₂ of inspired air decreases alveolar PCO₂,stimulating the central chemoreceptors.
• C)The decrease in PO₂ of inspired air decreases alveolar and arterial PO₂,stimulating the peripheral chemoreceptors.
• D)The decrease in total atmospheric pressure causes a greater negative pressure in the intrapleural space,resulting in deeper and more frequent breathing. 
• E)The decrease in the total barometric pressure at high altitude causes hypocapnea,which stimulates peripheral chemoreceptors.

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