Insulin will lowers blood glucose level by
(i) Stimulating transport of glucose from blood to muscle and adipose cells and indirectly causing the liver to take up glucose.
(ii) Promoting both oxidation of glucose and conversion of glucose into glycogen in muscles and liver cells.
(iii) Inhibiting metabolic breakdown of stored glycogen in liver and muscle cells.
(iv) Promoting synthesis of fats from glucose by adipose tissue and also inhibiting metabolic breakdown of fat.