The nurse caring for a patient recently diagnosed with lung disease encourages the patient not to smoke. What is the primary rationale behind this nursing action?
A) Smoking decreases the amount of mucus production.
B) Smoke particles compete for binding sites on hemoglobin.
C) Smoking causes atrophy of the alveoli.
D) Smoking damages the ciliary cleansing mechanism.
Ans: D
Feedback:
In addition to irritating the mucous cells of the bronchi and inhibiting the function of alveolar macrophage (scavenger) cells, smoking damages the ciliary cleansing mechanism of the respiratory tract. Smoking also increases the amount of mucus production and distends the alveoli in the lungs. It reduces the oxygen-carrying capacity of hemoglobin, but not by directly competing for binding sites.
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