Question

Deposits from cigarette smoke interfere with the normal functioning of cilia in the:

A) trachea
B) esophagus
C) bronchioles
D) pharynx

Answer 1

The answer to you question is very simple, Trachea, because a trachea is a large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs; the windpipe.

Therefore you answer is,

Trachea.

I hope that this has satisfied you, and if not then feel free to ask questions.