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. Decrease oxygenation due to decrease in muscle function- kyphosis primarily affects skeletal structure, not muscles.
B. Decrease oxygenation due to inability to change thoracic pressure adequately- kyphosis alters thoracic cage shape, restricting expansion and limiting pressure changes required for ventilation.
C. Decrease oxygenation due to loss of elasticity of lung tissue- this relates more to normal aging or emphysema, not kyphosis.
D. Decrease in oxygenation due to decrease nervous system response- kyphosis doesn’t affect the nervous system directly.
Correct Answer is C
Explanation
A. is located within the pleural cavities: it is part of the larynx, not the lungs.
B. is innervated by the phrenic nerve: phrenic nerve innervates the diaphragm, not the epiglottis.
C. Prevents food and water from getting into the respiratory passages: it acts as a flap that closes the trachea during swallowing.
D. Is a tube that connects the pharynx and the middle ear: that is the Eustachian tube.
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