Question

Describe any four hormones secreted by Adenohypophysis.

Name any four hormones secreted by adenohypophysis and give their significance.

Answer 1

1. Somatotropic Hormone (STH)/Somatotropin/Growth Hormone (GH): Secretion of GH is high till puberty later its secretion becomes low. However, it is continuously secreted throughout life for repair and replacement of body tissue or cells.
   Functions: 
   
   1. It stimulates growth of the body and development of all tissues.
   2. It accelerates protein synthesis and cell division.
   3. It stimulates the release of growth hormone.
2. Thyroid Stimulating Hormone (TSH)/Thyrotropin: TSH causes the thyroid glands to absorb more iodine for the production of thyroxine. Thyroxine is released as the colloid breaks down.
3. Adrenocorticotropic Hormone (ACTH)/Adrenocorticotropin:
   
   1. It stimulates the adrenal cortex to produce its hormones.
   2. It maintains the functioning of the adrenal cortex. 
4. Prolactin/Luteotropin/ Mammotropin: Secretion of this hormone is regulated by PIF (Prolactin inhibiting factor) of the hypothalamus.
   Functions:
   
   1. Activates the growth of mammary glands during pregnancy (mammotropin).
   2. Stimulates milk production and secretion of milk (lactogenic) by mammary gland after child birth.
   3. Maintenance of the corpus luteum (luteotropin) so that it keeps on secreting progesterone during pregnancy.
5. Gonadotropin:
   
   1. Follicle stimulating hormone: In females, it promotes the development of ovarian follicles, whereas in males, it promotes the development of seminiferous tubules.
   2. Luteinizing hormone (LH): LH aids in female ovulation. It stimulates the testes to create testosterone in males. As a result, LH in males is also known as ICSH.