A decline in arterial PO₂ to 70 mm Hg or below would likely result in A)a decrease in alveolar ventilation. B)an increase in alveolar ventilation. C)no change in alveolar ventilation. D)a prolonged breath hold.

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Quizplus · Accepted Answer

A decline in arterial PO2 to 70 mm Hg or below typically triggers an increase in alveolar ventilation. This response is mediated by peripheral chemoreceptors that detect the decrease in oxygen levels and stimulate the respiratory center to increase breathing rate and depth to enhance oxygen uptake and carbon dioxide elimination.

A Decline in Arterial PO2 to 70 Mm Hg or Below

A Decline in Arterial PO₂ to 70 Mm Hg or Below