Final answer:
The mucosa is covered by a mucous membrane containing taste buds and helps keep food out of the lower respiratory passages.
Step-by-step explanation:
The mucosa is the layer surrounding the lumen of the gastrointestinal (GI) tract. It is covered by a mucous membrane that contains taste buds. The role of the mucosa is to secrete mucus and absorb nutrients and water.
Additionally, it helps to keep food out of the lower respiratory passages by providing a protective barrier.