Question

Assertion: Ciliated epithelium is present in the inner lining of trachea and large bronchi.
Reason: Ciliary movement propels the mucus and foreign particles towards the larynx.

• A. Assertion is true but reason is false
• B. Both assertion and reason are true and the reason is the correct explanation of the assertion
• C. Both assertion and reason are false
• D. Both assertion and reason are true and the reason is not the correct explanation of the assertion

Answer 1

The correct option is B Both assertion and reason are true and the reason is the correct explanation of the assertion

The respiratory epithelium in trachea and bronchi is pseudostratified ciliated columnar glandular epithelium (PSCCGE).

It primarily consists of three main cell types – ciliated cells, goblet cells, and basal cells.

The ciliated cells are located across the apical surface and facilitate the movement of mucus and foreign particles across the respiratory tract.