Carotid body function in an organ work as_______________?
Correct answer: B. Differential pressure of oxygen in arterial blood
- A. Differential pressure of oxygen in venous blood
- B. Differential pressure of oxygen in arterial blood
- C. Differential pressure of oxygen in in tissue fluids
- D. Differential pressure of oxygen in in hemoglobin synthesis
Explanation
Carotid bodies primarily detect a fall in arterial oxygen partial pressure, especially when PaO₂ falls markedly, and then stimulate ventilation. They are not sensors of venous oxygen or haemoglobin synthesis.
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