Cell Types & Hormones Flashcards
Hepatocytes
Lacks a basement membrane facilitates exchange of materials with blood ( Numerous mitochondria, golgi complexes, numerous peroxisomes, glycogen deposits, lipid droplets.)
Secretion of bile
1) CCK released from the duodenal cells in response to fatty acids, protein digestive products, and Ca2+ 2) Contraction of smooth muscle in the wall of gall bladder 3) relaxation of the sphincter of oddi of hepatopancreatic ampulla and release of bile into duodenum via the major and minor duodenal papilla
Paneth cells
located at the base of the crypts of Lieberkuhn ; eosinophilic granules, secrete antimicrobial substances such as lysozyme.
Chief Cells
cells in the stomach that releases pepsinogen and chymosin. Pepsinogen is activated into the digestive enzyme pepsin when it comes in contact with acid produced by gastric parietal cells (fundus)
Parietal Cells
secrete hydrochloric acid (HCl) and intrinsic factor. These cells are located in the gastric glands found in the lining of the fundus and in the body of the stomach.
Secretin
Secreted by the neuroendocrine cells of the duodenum in response to chyme. stimulates intercalated ducts of the pancreas to produce large quantities of alkaline fluid (pH 8.0) rich in NaHCO3
Trypsinogen
Converted to active form, trypsin by enterokinase produced by duodenal mucosa. Digestion of proteins in chyme.
Wool hair
fine and crimped. More present young animals
Vellus Hair
finer and soft hair. young and women
Terminal hair
longer and coarse. Males and pubic regions
intrinsic factor
allows stomach to absorb vitamin b12