Gastric Motility and Secretion Flashcards
In which portion of the stomach is the muscle wall thicker?
Antrum
What generates peristaltic rhythm?
Pacemaker cells in longtitudinal muscle layer
How are slow waves conducted?
Through Gap Jx
what are slow waves?
spontaneous depol/repolorisation
What is gastrins effect on muscle contraction?
Increases
What does Distention of the stomach cause?
Long/Short Reflexes -> inc contraction
Which glands release Bicarcobonate?
Brunners gland (submucosal glands) in DD
What do duct cells of the panc secrete?
Bicarbonate
What do acinar cell in the panc prod?
digstive enzymes
What converts trypsinogen to trypsin?
Enterokinase
What is trypsins fx?
Convert all other zymogens to active
What is the fx of proteases?
cleve peptide bonds
What is the fx of nucleases?
hydrolyse `dna/rna
What is fx of elastase?
Collagen digestion
fx of phospholipidases?
phospoholipids to fatty acids