Class 11 Biology Chemical Coordination PITUITARY GLAND

PITUITARY GLAND

  • Located in bony cavity called sella tursica and attached to hypothalamus by a stalk.
  • Over secretion of GH stimulates abnormal growth of the body – Gigantism.
  • Low secretion of GH results in stunted growth – Dwarfism
  • Prolactin regulates the growth of mammary glands and formation of milk in them.
  • TSH stimulates the synthesis and secretion of thyroid hormones from thyroid gland.
  • ACTH stimulates the synthesis and secretion of steroid hormone (glucocorticoids) from adrenal cortex.
  • LH and FSH stimulate gonadal activity.
  • MSH acts on the melanocytes and regulates pigmentation of the skin.
  • Oxytocin acts on smooth muscles of our body and stimulates their contraction.
  • Vasopressin acts on kidneys and stimulates resorption of water and electrolytes by distal tubules and hence reduces loss of water through urine. So, it is also called as ADH.

Class_11_Biology_Chemical_Coordination_Pineal_And_Pituitary_Gland

Pic shows Pineal and Pituitary gland.

 

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