Multiple choice

Kallikreins are a subgroup of serine proteases, enzymes capable of cleaving peptide bonds in proteins present in the food. Which of the following digestive ducts participates in ion and water transport and secretes kallikrein?

  1. An intercalated duct

  2. A striated duct

  3. An excretory intralobular duct

  4. Intralobular ducts

  5. Interlobular ducts

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The striated duct is well developed in the submandibular gland. The epithelium of the striated duct participates in ion and water transport and secretes kallikrein. A segment of this duct is lined by cuboidal-to-columnar epithelial cells with basal infoldings containing numerous mitochondria.