In-Text Figure Based Questions
-Inhibition of medulla oblongata chemoreceptors and respiratory muscles has what effect on respiratory rate,elimination of CO2 at alveoli, and arterial PCO2? (Figure 23-26)
A) increased respiratory rate, increased elimination of CO2 at alveoli, and increased arterial PCO2
B) increased respiratory rate, decreased elimination of CO2 at alveoli, and decreased arterial PCO2
C) increased respiratory rate, increased elimination of CO2 at alveoli, and decreased arterial PCO2
D) decreased respiratory rate, increased elimination of CO2 at alveoli, and increased arterial PCO2
E) decreased respiratory rate, decreased elimination of CO2 at alveoli, and increased arterial PCO2

Question

Quizplus · Accepted Answer

Inhibiting the medulla oblongata chemoreceptors and respiratory muscles leads to a decreased respiratory rate because these structures are crucial for initiating and maintaining the breathing process. A decreased respiratory rate means less air (and thus less CO2) is moved in and out of the lungs, resulting in decreased elimination of CO2 at the alveoli. Consequently, with less CO2 being eliminated, the arterial PCO2 (partial pressure of carbon dioxide in arterial blood) increases.