Hyperventilation is stimulated by
A)increased activity of the apneustic center.
B)decreased contraction of the scalenes.
C)hypercapnia
D)hypoxemia.

Question

Quizplus · Accepted Answer

Hyperventilation is stimulated by a decrease in CO2 levels, known as hypocapnia. Therefore, hypercapnia, or an increase in CO2 levels, would not stimulate hyperventilation but rather a decrease in ventilation. Increased activity of the apneustic center would lead to an increased inspiratory drive, but not necessarily hyperventilation. Decreased contraction of the scalenes would not directly stimulate hyperventilation either. Hypoxemia, or a decrease in oxygen levels, can lead to hyperventilation but it would occur as a compensatory response to increase oxygen delivery to the body, rather than a direct stimulation.

Hyperventilation Is Stimulated by