13.3 Pancreas Flashcards
Pancreas has both
Endocrine and exocrine function
Pancreas sits
Inferior and deep (posterior/dorsal) to your stomach
Pancreas exocrine functions
Associated with digestion
- duct to small intestine
- digestive enzymes
- bicarbonate
Digestive enzymes are produced
Acini
Islets of Langerhan’s have
Alpha (produce glucagon, endocrine hormone, raises blood glucose)
Beta cells (release insulin, endocrine hormone, lowers blood glucose)
Insulin feedback loop
Blood glucose raises from meal
Pancreas Release insulin
Tissues take up glucose (stored as glycogen or triglyceride fat)
Blood glucose reduces
Insulin stops releasing
Diabetes term means
Overproduction of urine
Diabetes mellitus caused by
Too much glucose in the blood
Type 1
Insulin dependent
Autoimmune (destroyed own islets)
Can’t produce insulin
GAD65
Type 2
Insulin resistance
damage to membrane receptor Glut4
Inflammatory response
Caused by Obesity, refined carbs, low fitness
Without glut4
No amount of insulin will let glucose in the cell, remains in blood stream
Increased blood glucose causes
Increased lipid catabolism (ketoacidosis)
Microvascular damage (retinopathy, nephropathy, neuropathy)
Macrovascular damage (atherosclerosis, heart disease, myocardial infarction, stroke)
Overwhelms reabsorption in kidneys (dehydration)