Endocrine pancreas Flashcards
What forms pancreas?
2 pancreatic buds
Function of pancreas?
1) Make and secrete digestive enzymes and fluid
2) Release peptide hormones into portal vein
What 2 types cells present in pancreas?
Acini cells
Islets of langerhans
What is more common acini or islets of langerhans?
Acini- 98-99%
Islets of langerhans- 1-2%
Function of acini cells?
Make and secrete fluid and digestive enzymes
Secrete via pancreatic ducts into duodenal papilla
How is fluid and digestive enzymes secreted from pancreas?
Via pancreatic ducts into duodenal papilla
Function of islets of Langerhans?
Release peptide hormones into portal vein
Where are peptide hormones released into?
Portal vein
What do (IOL) produce:
Alpha
Beta
Delta
Alpha- glucagon
Beta- insulin
Delta- somatostatin (inhibit)
What cells secrete glucagon?
Alpha cells iol
What cells secrete insulin?
Beta iol
What cells secrete somatostatin?
Delta
Function of insulin?
1) Reduce glucose output by liver
2) Increase storage of glucose, FA + aa
3) Stops breakdown of fat + muscle
Uptake glucose for storage (glycogenesis)
Decrease blood glucose
Function of glucagon?
1) Stimulate breakdown glycogen to glucose in liver (glycogenolysis)
2) Stimulates breakdown of fat + muscle
3) Activate gluconeogenesis- conversion of amino acids into glucose.
Increase blood glucose