What is a goblet cell? what is secreted by a goblet cell?

Explanation:

Goblet cells can be found in numerous numbers distributed among the columnar epithelial cells throughout the gastrointestinal tract. They are specialized in producing and secreting a high molecular weight mucopolysaccharide known as mucins. The columnar epithelial cells of the respiratory airways contain cilia on their apical surface (the surface facing the lumen, or cavity), which move the mucus toward the throat.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

my teacher would say no s