Endo & Exocrine Glands

Question 1

Describe Serous cells.

Answer 1

Basally placed round nucleus, cytoplasm has reddish granules which contain secretory products of the cell.

Question 2

Describe Mucus cells.

Answer 2

Flay nucleus pressed to the outside.

Question 3

Describe Intercalated ducts

Answer 3

Formed by cuboidal epithelium. Add bicarbonate ions to saliva (buffer) and absorb Cl. Give watery secretion.

Question 4

Describe Striated ducts.

Answer 4

Formed by columnar cells, centrally placed nucleus. Striations from folding in the cytoplasm where mitochondria live. This allows the cell to secrete K and antibodies and absorb Na. Have short microvilli.

Question 5

Parotid gland

Answer 5

Secretes alpha-amylase. The first step in digesting starch. Produces 30% of total saliva.

Question 6

Sunlingual gland

Answer 6

Made of mucous acini with serous demilunes - produces mixed saliva. Produces 5% of total saliva.

Question 7

Location and function of Myoepithelial cells

Answer 7

Sublingual gland, around the serous and mucus acini. Contractions facilitate the secretion process.

Question 8

Submandibular gland

Answer 8

Produces 60% of total saliva, 90% serous and 10% mucus.