Control of Blood Glucose

Question 1

What happens when there is an increase in blood glucose concentration?

Answer 1

receptors in pancreas detect an increase
beta cells secrete insulin
insulin binds to receptors in liver and muscle - increases their permeability to glucose

more glucose is absorbed by facilitated diffusion
glycogenesis - glucose to glycogen
increases the rate of respiration

negative feedback

Question 2

What happens when the blood glucose concentration is low?

Answer 2

receptors in pancreas will detect blood glucose is low e.g. after exercise

alpha cells secrete glucagon 
glucagon binds to receptors on liver cells
decreases the rate of respiration
gluconeogenesis - non carbs to glucose
glycogenolysis - glycogen to glucose