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  • The hormones are chemical substances provide chemical co-ordination, integration and regulation in human body.
  • They regulate metabolism, growth and development of our organs.
  • The pituitary gland is divided into three major parts called as pars distalis, pars intermedia and pars nervosa.
  • The pituitary hormones regulate the growth and development of somatic tissues and activities of peripheral endocrine gland.
  • The hormone thyrocalcitonin regulates the calcium levels in our blood.
  • Hormone thymosin play a major role in differentiation of T-lymphocytes, which provide cell mediated immunity.
  • Adrenal medulla secretes epinephrine and norepinephrine that increase alertness, sweating, heartrate, cardiac output, strength of contraction, proteolysis and lipolysis.
  • Glucagon stimulates glycogenolysis and gluconeogenesis resulting in hyperglycemia.
  • The testes secrete androgens, stimulate the development, maturation and functions of male accessory organs.
  • The ovary secretes estrogen and progesterone.
  • Progesterone plays a important role in the maintenance of pregnancy as well as in mammary gland.
  • The gastrointestinal tract secretes gastrin, secretin, cholecystokinin and gastric inhibitory peptide.

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