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 C
Explanation
A. Pharynx: Transports air but is not primarily responsible for warming/moistening.
B. Larynx: Functions in voice production and airway protection.
C. Nostrils/nares: Correct; nasal passages warm, moisten, and filter the air.
D. Alveoli: Site of gas exchange, not air conditioning.
Correct Answer is B
Explanation
A. Due to contraction of the trapezius muscle: Not involved in normal breathing.
B. Referred to as ventilation (breathing): Correct; ventilation is the process of moving air in and out of the lungs.
C. Due to relaxation of the diaphragm and intercostal muscles: Only exhalation is passive due to relaxation.
D. Caused by contraction and relaxation of the bronchiolar smooth muscle: Regulates airflow, not breathing movements.
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