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A 67-year-old male with a 40 pack-year history of smoking visits his physician with a complaint of coughing up blood and recent unintentional weight loss. The physician is concerned about lung cancer given the patient's smoking history. A full workup demonstrates a suspicious lung mass and a lung biopsy is subsequently performed. Which of the following figures correctly demonstrates the type of epithelium which is normally found in the tracheobronchial tree?
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A 67-year-old man is hospitalized after several days of fever and increasing shortness of breath. Respiratory viral panel returns positive for influenza A and the patient is started on a standard five day course of oseltamivir. Despite therapy, his shortness of breath continues to worsen and his oxygen saturation decreases to the point where ICU transfer and intubation are required. Chest radiograph shows bilateral infiltrates. Clinical criteria are consistent with development of Acute Respiratory Distress Syndrome (ARDS). After several weeks of supportive therapy, the patient improves with lung function returning to near normal. Which of the following processes is involved in the regeneration of alveolar lining after damage to alveoli occurs?
Squamous cell proliferation
Sweeping of debris out of the alveoli by ciliated cells
Excess mucus production by goblet cells
Proliferation of surfactant-secreting cells
Proliferation of club cells