Impulses from the primary respiratory center to the respiratory muscles will initiate
A)contraction for expiration.
B)contraction for inspiration.
C)relaxation for expiration.
D)relaxation for inspiration.

Question

Quizplus · Accepted Answer

The primary respiratory center in the medulla oblongata is responsible for controlling the basic rhythm of breathing. When impulses are sent from this center to the respiratory muscles, it initiates contraction for inspiration, leading to the inhalation of air into the lungs. Therefore, choice B is the correct answer.

Impulses from the Primary Respiratory Center to the Respiratory Muscles