Oxygen diffuses from the alveoli into the:
Bronchioles
Trachea
Pulmonary capillaries
Lungs
The Correct Answer is C
A. Bronchioles- bronchioles are airways that lead to alveoli but are not where gas exchange occurs.
B. Trachea- this is a conduction pathway for air, not where diffusion of gases happens.
C. Pulmonary capillaries- oxygen diffuses across the alveolar membrane into the pulmonary capillaries for transport in the blood.
D. Lungs- this is too broad; gas exchange occurs specifically at the alveolar-capillary membrane.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
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.
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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