The main muscle responsible for pulmonary ventilation is?.
External intercostals.
Abdominals.
Internal intercostals.
Diaphragm.
The Correct Answer is D
hoice A rationale:
External intercostals assist in inspiration by elevating the ribs and expanding the chest cavity.
Choice B rationale:
Abdominals are not the main muscles responsible for pulmonary ventilation.
Choice C rationale:
Internal intercostals assist in forced expiration.
Choice D rationale:
The diaphragm is the main muscle responsible for pulmonary ventilation.
So, the correct answer is Choice D, after analyzing all choices.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Veins do not always carry deoxygenated blood. The pulmonary veins are an exception as they carry oxygenated blood from the lungs to the heart.
Choice B rationale:
Veins do not carry blood away from the heart. They carry blood back toward the heart.
Choice C rationale:
Veins do not have a thick tunica media. The tunica media is thinner in veins than in arteries.
Choice D rationale:
Veins have valves. This is a true statement. The valves in veins prevent blood from flowing backward.
Correct Answer is D
Explanation
Choice A rationale:
After passing through the glottis, inspired air does not travel to the pharynx. The pharynx is actually before the glottis in the airway.
Choice B rationale:
Inspired air does not travel directly to the bronchi after passing through the glottis.
Choice C rationale:
Inspired air does not travel directly to the alveoli after passing through the glottis.
Choice D rationale:
After passing through the glottis, inspired air travels to the larynx.
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