Q:

Which molecule has the greatest effect in controlling lung ventilation?

waelhammad
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2022-10-19
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Which molecule has the greatest effect in controlling lung ventilation?

  1. oxygen in the blood
  2. hydrogen ions in the blood
  3. carbon dioxide in the blood
  4. oxygen in the cerebrospinal fl uid
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waelhammad
2022-10-19
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C: It is carbon dioxide and not oxygen that stimulates lung ventilation. Respiratory centre of the brain responds to incoming signals from peripheral chemical receptors (when CO2 ↑), by sending signals to respiratory muscles via nerves.

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