Final answer:
Goblet cells are responsible for producing the mucus in mucous membranes, found in the lining of the respiratory and digestive tracts. These cells provide lubrication and protection by trapping irritants and pathogens.
Step-by-step explanation:
The type of cells that produce the mucus for the mucous membranes are goblet cells. Goblet cells are specialized cells that are found interspersed among the columnar epithelial cells of both the respiratory tract and the digestive tract. These cells have an essential role in maintaining the health and function of these tracts. For instance, in the respiratory tract, goblet cells secrete mucus that captures and traps irritants and microorganisms, preventing them from entering the lungs. This action is enhanced by ciliated cells, which move the mucus along with trapped particles out of the respiratory tract.
Columnar epithelial cells contribute to secretion in the intestines by releasing digestive enzymes, but the specific task of mucus production is performed by goblet cells. An example of this can be observed in the small intestine's lining, where mucus secreted by goblet cells aids in lubrication and provides a barrier against pathogens.