This nerve stimulates the diaphragm.
Phrenic nerve
Optic nerve
Intercostal nerve
Sciatic nerve
The Correct Answer is A
A. Phrenic nerve: Correct; it controls diaphragm contraction, enabling breathing.
B. Optic nerve: Responsible for vision, not respiration.
C. Intercostal nerve: Controls intercostal muscles, but not the diaphragm.
D. Sciatic nerve: Largest nerve in the leg; unrelated to respiration.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. CO₂ levels: Correct; central chemoreceptors are most sensitive to carbon dioxide levels.
B. K⁺ levels: Affects cardiac function more than breathing.
C. O₂ levels: Peripheral chemoreceptors respond to oxygen, but CO₂ is the primary stimulus.
D. Na⁺ levels: Affects fluid balance, not breathing regulation directly.
Correct Answer is B
Explanation
A. Bronchial tree, carina, apex: These refer to lower airway structures and lung anatomy, not the throat/voice box.
B. Larynx, pharynx, trachea: Larynx = voice box, Pharynx = throat, Trachea = windpipe.
C. Larynx, epiglottis, eustachian tube: The eustachian tube connects the middle ear to the throat; not part of respiratory naming here.
D. Larynx, vocal cords, trachea: Vocal cords are part of the larynx; pharynx (throat) is missing.
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