The trachea branches into the right and left:
Bronchioles
Bronchi
Alveoli
Nares
The Correct Answer is B
A. Bronchioles: Smaller branches that come after the bronchi.
B. Bronchi: Correct; the trachea divides into the right and left main (primary) bronchi.
C. Alveoli: Terminal ends of the respiratory tract where gas exchange occurs.
D. Nares: External nostrils, not connected directly to the trachea.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Grapelike sacs located very close to pulmonary capillaries: This correctly describes the structure of alveoli.
B. Located within the lungs: Alveoli are indeed located in the lungs.
C. Primarily concerned with gas exchange: Alveoli are the main site of gas exchange in the lungs.
D. Contain smooth muscle: Alveoli do not contain smooth muscle; this is a feature of bronchi and bronchioles.
Correct Answer is C
Explanation
A. Decreased efficiency of the respiratory muscles: Affects ventilation but not directly related to infection susceptibility.
B. Loss of elasticity of the lung tissue: Affects gas exchange but doesn't impair immune defense.
C. The phagocytes in the lungs become less effective: Correct; weakened immune response increases infection risk.
D. Number of alveoli decreases: Affects surface area for gas exchange, not immune function.
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