Chemicals Hormones Enzymes Response messengers( Chemicals, Hormones, Enzymes, Response messengers ) are produced and secreted by pituitary organ endocrine central nervous( pituitary, organ, endocrine, central nervous ) glands, which make up the central nervous system endocrine system peripheral nervous system homeostatic system( central nervous system, endocrine system, peripheral nervous system, homeostatic system )

Blood glucose too high:
insulin glucagon glycogen amylase( insulin, glucagon, glycogen, amylase ) is not secreted secreted( not secreted, secreted ) into the blood
pancreas liver spleen small intestine( pancreas, liver, spleen, small intestine ) converts glucose to glucagon glycogen enzyme( glucagon, glycogen, enzyme )
blood glucose levels go up go down stay the same( go up, go down, stay the same )