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 D
Explanation
A. Grapelike sacs located very close to pulmonary capillaries: This correctly describes the structure of alveoli.
B. Located within the lungs: Alveoli are indeed located in the lungs.
C. Primarily concerned with gas exchange: Alveoli are the main site of gas exchange in the lungs.
D. Contain smooth muscle: Alveoli do not contain smooth muscle; this is a feature of bronchi and bronchioles.
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.
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