Which cell type is specialized for mucus production in mucosal epithelia?

Which cell type is specialized for mucus production in mucosal epithelia?

• A. Ciliated cell
• B. Basal cell
• C. Goblet cell
• D. Squamous cell

Answer: (C)

Goblet cells are specialized mucus-secreting cells found in mucosal epithelia. Their cytoplasm is packed with mucin-containing granules, which are released by exocytosis to form mucus. This mucus coats and protects mucosal surfaces, lubricates them, and traps dust, microbes, and other particulates. In places like the respiratory and digestive tracts, goblet cells work with ciliated cells to move the mucus out of the tract, creating a coordinated mucociliary escalator. Other cell types have different roles: ciliated cells mainly propel mucus, basal cells are progenitors that renew the epithelium, and squamous cells provide a protective, flattened barrier rather than secretion.

Goblet cells are specialized mucus-secreting cells found in mucosal epithelia. Their cytoplasm is packed with mucin-containing granules, which are released by exocytosis to form mucus. This mucus coats and protects mucosal surfaces, lubricates them, and traps dust, microbes, and other particulates. In places like the respiratory and digestive tracts, goblet cells work with ciliated cells to move the mucus out of the tract, creating a coordinated mucociliary escalator. Other cell types have different roles: ciliated cells mainly propel mucus, basal cells are progenitors that renew the epithelium, and squamous cells provide a protective, flattened barrier rather than secretion.