KNAT Practice Test Question from KNAT Tutor Lesson: Respiratory System
Please see the question below. Scroll down for the correct answer and video explanation.
KNAT Practice Test Answer Explanation
The correct answer is D. Nose. The nose is part of the upper respiratory tract. Because it is the site where air enters the body, nose hairs help prevent airborne particles from entering the lungs. The respiratory organs can be divided into the upper and lower respiratory tract. The upper respiratory tract includes the nasal cavity, pharynx, and larynx. The trachea, bronchus, and lungs belong to the lower respiratory tract. The nasal cavity opens to the nose. The nose and nasal cavity warm and moisten air as a person breathes. As a defensive mechanism, tiny nose hairs and mucus produced by the epithelial mucosa cells in the nose help prevent particles in the air from entering the lungs.
To learn more, watch our video explanation below:
[Source: KNAT Tutor Lesson: Respiratory System]