Inspiratory and Expiratory Neurons

Question

Inspiratory and expiratory neurons
A) are located within the respiratory control center in the brain stem.
B) are sensitive primarily to PO2.
C) line the breathing tubes, especially the bronchioles.
D) All of the above are true.

Accepted Answer

Inspiratory and expiratory neurons are located within the respiratory control center in the brain stem, specifically in the medulla oblongata. These neurons regulate the rhythm and depth of breathing by controlling the contraction and relaxation of respiratory muscles. Option B is not true as there is no known substance with that name. Option C is also incorrect as neurons do not line the bronchioles but rather control their constriction and relaxation through the release of neurotransmitters.