homeostasis

Question 1

how insulin effects blood glucose levels

Answer 1

beata cells secrete insulin

binds to specific receptors on muscle and liver cells
increases permeability of muscle cell membranes by increasing channel proteins which can the take up more glucose
GLYCOGENSIS- activate enzymes which convert glucose to glycogen as cells can store glycogen
insulin increases the rate of respiration of glucose

Question 2

How glucagon effects blood glucose concentration

Answer 2

secreted by alpha cells

binds to receptors on liver membrane of cell
GLYCOGENOLYSIS- activates enzymes which break down glycogen to glucose
GLUCONEOGENESIS- forming of glucose from glycerol and amino acid glucagon activates enzyme for this
glucagon decreases rate of respiration of glucose

Question 3

how insulin increases channel proteins in muscle cell membranes

Answer 3

when insulin low GLUT4 stored in vesicles in cytoplasm of cells
when insulin binds to specific receptors trigger movemnet of GLUT4 to membrane

Question 4

how does adrenaline increase blood glucose potential

Answer 4

binds to receptors on membrane of liver cells activating glycogenolysis and inhibits glycogensis
activates glucagon secretion and inhibits insulin secretion