control of blood glucose

Question 1

increase in blood glucose

Answer 1

• increase is detected by receptors in the pancreas
• Beta cells in the islets of Langerhans secrete insulin
• Insulin binds to receptors in liver and muscle cells, increasing there permeability to glucose
  Then 3 possible things can happen:
  –> more glucose can be absorbed by facilitated diffusion
  –> glycogenesis
  –> increased respiration

Question 2

decrease in blood glucose

Answer 2

• receptors in pancreas detect decrease
• Alpha cells in islets of Langerhans secrete glucagon
• glucagon binds to receptors on liver cells
• then 3 possible things can happen:
• -> decrease in respiration
• -> glycogenolysis
• -> gluconeogenesis