Which Correctly Describes the Cause of the Increase in Alveolar

question 82

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 P_CO2 of inspired air decreases alveolar P_CO2, stimulating the peripheral chemoreceptors.
• B) The decrease in P_CO2 of inspired air decreases alveolar P_CO2, stimulating the central chemoreceptors.
• C) The decrease in P_O2 of inspired air decreases alveolar and arterial P_O2, 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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