Digestion 2 Flashcards
Where do the short reflexes originate and how are they intergrated?
Originate in the Enteric nervous system and are integrated w/o CNS
Where do the long reflexes originate and how are they intergrated?
Originate in the Enteric nervous system and are integrated w/ CNS
Where do cephalic reflexes originate?
CNS
Name 3 places secretions can be released
Released into the blood
Released into the lumen
Secretion to neighbouring cells
What do serous acini secret?
amylase
lipase
What do mucous acini secrete?
mucous
What do ducts cells secrete?
Water and HCO3
What is secreted alongside mucous and why?
Bicarbonate to buffer gastric acid to prevent damage to epithelium
What stimulates secretion of HCl and intrinsic factors?
Acetylcholine
Gastrin
Histamine
What cells secrete HCl and what is HCls function?
Parietal cells
HCl activates pepsin and kills bacteria
What cells secret intrisic factors and what is IFs function?
Parietal cells
IF form complexes w/ Vitamin B-12 to permit absorption
What cells secrete Histamine and what is Histamines function?
Enterochromaffin like cell
Stimulates gastric acid secretion
What does Acetylcholine stimulate the release of in the stomach?
Hcl Intrinsic Factor Histamine Pepsin gastric lipase gastrin
What cells secrete Pepsin and what is Pepsins function?
Chief cells
Digests proteins
What cells secrete gastric lipase and what is Gastric lipases function?
Chief cells
Digests fats