Which type of epithelium would likely secrete mucus?

Columnar cells are typically associated with mucus secretion, primarily due to their structure and the presence of specialized cells known as goblet cells. Goblet cells, found within the columnar epithelium, are deduced for their ability to produce and secrete mucus, which plays a vital role in lubrication and protection of epithelial surfaces. This type of epithelium is often located in areas requiring this type of secretion, such as the respiratory and gastrointestinal tracts.

Mucus serves several functions, including trapping pathogens and particulate matter in the respiratory tract, facilitating the movement of food in the digestive system, and providing a protective layer over epithelial surfaces. The tall, narrow shape of columnar cells increases the surface area available for secretion activities, enhancing their function in producing mucus.