The trachealis muscle
A) constricts the trachea.
B) controls the length and tension of the vocal cords.
C) initiates the cough reflex.
D) raises the larynx when swallowing.

Question

Quizplus · Accepted Answer

The trachealis muscle is a smooth muscle that surrounds the posterior surface of the trachea. Its contraction constricts the trachea, which can increase the velocity of air flow and help expel mucus or foreign particles during coughing.

The Trachealis Muscle