Question

the structure where the trachea bifurcates into left and right bronchi is particularly sensitive to the presence of food particles, and it stimulates a very strong coughing reflex when food is present. this structure is called the
a. carina
b. cricoid
c. lingula
d. alveoli

Explanation:

The carina is a ridge - like structure at the point where the trachea bifurcates into the left and right bronchi. It is highly sensitive to the presence of foreign bodies (such as food particles) and can trigger a strong cough reflex. The cricoid is a cartilage in the larynx. The lingula is a part of the lung (a small tongue - like projection of the upper lobe of the left lung). The alveoli are the small air sacs in the lungs where gas exchange occurs.

Answer:

A. Carina