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. Yearly chest x-rays- this detects disease but does not prevent it.
B. Don’t smoke or quit smoking- smoking is the most significant modifiable risk factor for COPD and lung cancer.
C. Daily exercise- while beneficial for overall health, it does not prevent lung disease as effectively as avoiding smoking.
D. Healthy diet- good nutrition supports health but is less specific for preventing lung diseases.
Correct Answer is D
Explanation
A. Bronchial tree: The bronchial tree refers to the entire system of airways including the trachea, bronchi, and bronchioles.
B. Bronchioles: Bronchioles are smaller airways that arise from bronchi and do not contain cartilage. They are located further down the respiratory pathway, closer to labels #5 or #6.
C. Alveoli: Alveoli are the tiny air sacs at the very end of the respiratory tract where gas exchange occurs. They are shown at label #7, not #3.
D. Bronchi: Bronchi are the major air passages that branch off from the trachea. Label #3 is pointing to a structure at this level-larger than bronchioles but smaller than the trachea. It is one of the primary or secondary bronchi.
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