Changes

Monogastric Stomach - Anatomy & Physiology (view source)

Revision as of 08:08, 17 July 2008

108 bytes added , 08:08, 17 July 2008

→‎Histology

Line 77: Line 77:

*Chief (zygomatic) cells secreting pepsinogen

−

-Secreted in response to vagus and gastrin

+

**Secreted in response to vagus and gastrin

−

-Basophilic

+

**Basophilic

−

-More abundant in base of glands

+

**More abundant in base of glands

+

**Pepsinogen unfolds and cleaves itself (autocatalyses) in response to hydrochloric acid

+

**Only active in acidic envrionments

[[Image:Fundic region of glandular stomach.jpg|thumb|right|150px|Fundic Region of Glandular Stomach (Parietal and Chief cells)- Copyright RVC 2008]]

*Goblet cells secreting mucous

−

-Protects against autodigestion

+

**Protects against autodigestion

*Parietal (oxyntic) cells secreting hydrochloric acid in gastric pits

−

-Aids digestion

+

**Aids digestion

−

-Activates gastric enzymes, e.g. pepsinogen

+

**Activates gastric enzymes, e.g. pepsinogen to pepsin

−

-Kills microorganisms that enter with food

+

**Kills microorganisms and enzymes that enter with food

−

-Secreted in response to vagus or pepsin

+

**Secreted in response to vagus or pepsin

−

-Large, pyramid shaped

+

**Large, pyramid shaped

−

-More abundant in upper region of glands

+

**More abundant in upper region of glands

*Gastrin from pyloric G cells

Nabrown

3,326

edits