Which cell type forms the mucosal barrier and secretes mucus to trap pathogens?

Which cell type forms the mucosal barrier and secretes mucus to trap pathogens?

• A. Goblet cells
• B. Ciliated epithelial cells
• C. Melanocytes
• D. Fibroblasts

Answer: (A)

Goblet cells are the secretory cells in mucosal linings that produce mucus. They release mucins, which hydrate to form a gel-like mucus layer that coats the surface, trapping microbes and particulates and helping keep the epithelium moist and protected. This mucus barrier works with other ciliated cells to clear trapped pathogens from the surface. Melanocytes are pigment cells, and fibroblasts make connective tissue, so they don’t contribute to mucus production or the mucosal barrier in this way.

Goblet cells are the secretory cells in mucosal linings that produce mucus. They release mucins, which hydrate to form a gel-like mucus layer that coats the surface, trapping microbes and particulates and helping keep the epithelium moist and protected. This mucus barrier works with other ciliated cells to clear trapped pathogens from the surface. Melanocytes are pigment cells, and fibroblasts make connective tissue, so they don’t contribute to mucus production or the mucosal barrier in this way.