Biology · Gaseous Exchange

The goblet cells are unicellular exocrine gland. Goblet cells are scattered in the epithelial linings of the intestinal and respiratory tracts. They secrete mucin and create a protective mucus layer.

This option is correct. Goblet cells are specialized unicellular exocrine glands found in the epithelial linings of the intestinal and respiratory tracts. They secrete mucin, which forms mucus that protects and lubricates these linings.

This is incorrect. Endocrine glands secrete hormones directly into the bloodstream, and goblet cells do not produce hormones or possess endocrine functions.

This is incorrect because goblet cells are unicellular, meaning they consist of a single cell, unlike multicellular glands that are composed of multiple cells.

This option is incorrect for two reasons: goblet cells are unicellular, not multicellular, and they do not secrete hormones like endocrine glands do.