GIT George: intro Flashcards
name the 2 controls of the GIT
Neoronal and Hormonal controls
Neurons secretes…
Noradrenaline, Acetylcholine, 5HT, Purines, Nitric oxide, variety of peptides.
Hormones: paracrine and endocrine secretes…
Paracrine: gastrin and other peptides
Endocrine: histamine and a variety of regulatory peptides
4 main functions of GIT
Gastric secretions, formation and excretion of bile, vomit, bowel movement and faeces excretion
Gastric secretions of:
Peptic, chief cells
pepsinogens
Gastric secretions of:
parietal or oxyntic cells
hydrochloric acid
Gastric secretions of:
mucus secretion cells
mucus and bicarbonate
3 stimuli of parietal cells
gastrin (hormone)
acetylcholine (neurotransmitter)
histamine (local hormone/neurotransmitter)