Gastric motility and Pancreatic function Flashcards
What generates gastric peristaltic waves?
Pacemaker cells
What do slow waves produce?
Spontaneous depolarisation/ repolarisation
What determines the strength of contraction?
Number of action potentials
What effect does gastrin have on contraction?
Increases contraction
What type of glands secrete bicarbonate
Brunner’s glands
What will acid in the duodenum trigger?
HCO3 secretion
Release of secretin from S cells cause HCO3 secretions
What are the 3 parts of the pancreas?
Head
Body
Tail
What are the Islets of Langerhans?
Cells that produce insulin, glucagon and somatostatin
What does somatostatin control?
Secretion of insulin and glucagon
What are the functions of the exocrine pancreas?
Secretion of bicarbonate by duct cells
Secretion of digestive enzymes by acing cells
What are zymogens?
Inactive enzymes which prevent autodigetion of pancreas
What stimulates bicarbonate secretions?
Secretin
When is secretin released
Response to acid in the duodenum
What stimulates zymogen secretion?
Cholecystokinin
When is CKK released?
In response to fat/amino acids in duodenum
