These respiratory structures are made up of mostly smooth muscles and determine the flow of air to the alveoli:
Bronchi
Larynx
Bronchioles
Trachea
The Correct Answer is C
A. Bronchi: Contain cartilage and some smooth muscle but are not the primary regulators of airflow.
B. Larynx: Functions in sound production and airway protection, not airflow regulation to alveoli.
C. Bronchioles: Correct; they are lined with smooth muscle that controls airflow to alveoli.
D. Trachea: A rigid structure with cartilage rings; does not regulate airflow via muscle tone.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
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.
Correct Answer is B
Explanation
A. 90-95%: acceptable in some chronic conditions, but not the ideal normal.
B. 95-100%: this is the normal range for oxygen saturation in healthy adults.
C. 86-89%: indicates hypoxemia.
D. 80-85%: severely hypoxic, needs medical attention.
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