An increase in blood _____ is most likely to increase the rate of breathing.
CO2
Volume
Bilirubin
Calcium
The Correct Answer is A
A. CO₂: High CO₂ (hypercapnia) stimulates the respiratory center to increase breathing.
B. Volume: Blood volume doesn't directly affect respiratory rate.
C. Bilirubin: This is associated with liver function and jaundice, not respiration.
D. Calcium: Calcium levels affect muscle function, not the breathing rate directly.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Bronchioles-glottis-alveoli: This is not a correct sequence; air doesn't go from bronchioles to glottis.
B. Trachea-bronchi-bronchioles: This is the correct anatomical sequence of airflow.
C. Larynx-alveoli-carina: Carina comes before the alveoli and is part of the tracheal bifurcation.
D. Bronchi-trachea-alveoli: Air flows from trachea → bronchi → alveoli, not bronchi → trachea.
Correct Answer is A
Explanation
A. It is difficult to keep the alveoli open- surfactant reduces alveolar surface tension; without it, alveoli collapse (atelectasis).
B. Bronchioles relax- not directly related to surfactant.
C. The alveoli fill with water- surfactant prevents collapse, not water entry.
D. Air enters the intrapleural space- this would cause a pneumothorax, unrelated to surfactant function.
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