What Is the Respiratory Membrane and What Is Its Role

question 22

Multiple Choice

What is the respiratory membrane and what is its role in ventilation?

• A) It lines the nasal cavity, where it serves to warm and moisten inspired air.
• B) It lines the bronchial tree, where it secretes a layer of protective mucus, which serves to purify air entering the respiratory tract.
• C) It consists of the alveolar epithelium, the capillary endothelium and their joined basement membranes; it provides the surface through which gas exchange occurs.
• D) It lines the thoracic cavity, where it aids in lung expansion.

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