Question

Which of the following statements about the trachea is false?

a.is reinforced with C-shaped cartilages
b.is reinforced with D-shaped cartilages
c.alters its diameter in response to the autonomic nervous system
d.contains many mucous glands
e.is lined by pseudostratified ciliated columnar epithelium

Answer 1

The trachea is not reinforced with D-shaped cartilages, but with C-shaped cartilages stacked together, which provide structural support and prevent the trachea from collapsing. The false statement about the trachea is option (b).

Step-by-step explanation:

The false statement about the trachea is option (b), which states that the trachea is reinforced with D-shaped cartilages. In reality, the trachea is reinforced with C-shaped cartilages that are stacked together. These cartilages provide structural support to the trachea, preventing it from collapsing during inhalation and exhalation.