Hypoxic drive is stimulated by which condition?

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Multiple Choice

Hypoxic drive is stimulated by which condition?

Explanation:
Hypoxic drive is the respiratory boost triggered by falling oxygen levels detected by peripheral chemoreceptors in the carotid bodies. When PaO2 drops—typically below about 60 mmHg—these receptors send signals to increase ventilation to raise oxygen intake. This is why low PaO2 best stimulates the hypoxic drive. The usual breathing drive in healthy people comes from CO2 levels sensed by central chemoreceptors, not from low oxygen. In chronic CO2 retainers, the CO2 response is blunted, making hypoxic drive relatively more noticeable, but the trigger remains low oxygen tension.

Hypoxic drive is the respiratory boost triggered by falling oxygen levels detected by peripheral chemoreceptors in the carotid bodies. When PaO2 drops—typically below about 60 mmHg—these receptors send signals to increase ventilation to raise oxygen intake. This is why low PaO2 best stimulates the hypoxic drive. The usual breathing drive in healthy people comes from CO2 levels sensed by central chemoreceptors, not from low oxygen. In chronic CO2 retainers, the CO2 response is blunted, making hypoxic drive relatively more noticeable, but the trigger remains low oxygen tension.

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