What is the alveolar-capillary membrane?
the layer of cells through which gases are exchanged
the layer of cilia that traps debris from entering lungs
the pathway to the lungs from the trachea
a pulmonary artery that exchanges gases

The alveolar-capillary membrane is the layer of cells through which gases are exchanged.

Option: A

Explanation:

In the gas exchange area of the lungs, there is the blood–air or alveolar capillary barrier or membrane. It aims to prevent the development of air bubbles in the blood, and blood from reaching the alveoli. It is generated among the two cells by the type 1 pneumocytes of the alveolar barrier, capillary endothelial cells and the basement layer.

Barrier breakdown can occur in a pulmonary barotrauma. It occurs due to many potential causes, involving blast damage, swimming-induced pulmonary edema, and breathing gas trapment or trapping in the lung throughout depressurization, which can happen throughout ascent from submarine diving or pressure reduction from a pressurized vessel, environment, or pressure suit.

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