(i) Adrenaline and noradrenaline.
(ii) Insulin and Glucagon.
Adrenaline and noradrenaline: Adrenaline increases the blood sugar and blood lactic acid levels, noradrenaline has very little effect on them.
Insulin : It enables the liver and muscles to store glucose as glycogen (glycogenesis) and enables tissues to take up and use glucose as a source of energy. This lowers the blood glucose level.
Glucagon : It brings about a change of liver glycogen into blood glucose (glycogenolysis). It causes an increase in the blood glucose level. It also forms glucose from amino acids and fats (gluconeogenesis).
