Pancreatic islets Flashcards
The pancreas is both an endocrine and exocrine gland TRUE OR FALSE
True
Where is the pancreas located
Curve of duodenum
Pancreatic acini
Exocrine cells arranged in clusters and produce digestive enzymes
Pancreatic islets
Tiny clusters of endocrine cells
Suprarenal cortex hormones
Mineralcorticoids- aldosterone
Glucocorticoids-cortisol
Androgens-DHEA
Aldosterone
Increases blood k+ and antiotensin 1 stimulate secretion.
- increases blood levels of Na+ and decreases k+
Glucocorticoids
ACTH- stimulates release, CRH promotes ACTH in response to stress and low blood levels of glucocorticoids
Increases protein breakdown except in liver. Provides resistance to stress
Androgen
ACTH stimulates secretion.
Assist in early growth and axillary of and public hair in both sexes, libido in females
Suprarenal medulla hormones
Epinephrine and norepinephrine
Epinephrine and norepinephrine
Release acetylcholine
Enhance effects of sympathetic part of ANS during stress
Alpha cells
Secrete glucagon which raises blood glucose levels
Beta cells secrete
Insulin which lowers blood glucose levels
Delta cells(D cells)
Secrete somatostatin which inhibits both insulin and glucagon from A and B cells
Pancreatic polypeptide cells (F cells)
Secrete pancreatic polypeptide which inhibits somatostatin secretion, gallbladder contraction and secretion of digestive enzymes by pancreas
Hypoglycemia
Triggered by low glucose level in blood. Stimulates secretion of glucagon
