The membrane that lines passageways that open to the exterior environment is called __________.
A)the lamina propria
B)endothelium
C)a synovial membrane
D)a serous membrane (serosa)
E)a mucous membrane (mucosa)

Question

Quizplus · Accepted Answer

The membrane that lines passageways that open to the exterior environment is called a mucous membrane (mucosa). This type of membrane secretes mucus, which helps to trap and remove debris and pathogens from the passageways. The other options listed are types of membranes found in different parts of the body; the lamina propria is a layer of connective tissue found beneath mucous membranes, endothelium lines blood vessels and the heart, synovial membranes line joint cavities, and serous membranes line the thoracic and abdominal cavities.

The Membrane That Lines Passageways That Open to the Exterior