insulin, glucagon, adrenaline Flashcards
1
Q
GLUCAGON: secreted by when blood glucose is... attaches to receptors in... effect on blood glucose? mechanisms activated:
A
alpha cells in islets of Langerhans LOW Liver Increases it 1. decreases rate of resp 2. glycogenolysis 3. gluconeogenesis
2
Q
ADRENALINE secreted by when blood glucose is... attaches to receptors in... effect on blood glucose? mechanisms activated:
A
adrenal cells
LOW
liver
Increases it
Activates: glycogenolysis by the secretion of glucagon
Inhibits: glycogenesis by the secretion of insulin
3
Q
INSULIN secreted by when blood glucose is... attaches to receptors in... effect on blood glucose? mechanisms activated:
A
Beta cells in islets of Langerhans High Liver and muscle cells Decreases it 1. increase resp 2. glycogenesis 3. increase in permeability of liver and muscle cells to glucose
4
Q
how does insulin increase liver and muscle cell permeability?
A
- insulin binds to receptors on the target cell surface membrane
- causing vesicles to fuse with cell membranes
- carrier proteins join the membrane so glucose can be absorbed by facilitated diffusion
