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CBSE Class 12-science Answered

Study the flow chart given below. Name the hormones involved at each stage and explain their functions.   Hypothalamus    Pituitary    Ovary    Pregnancy  
Asked by Topperlearning User | 13 Jun, 2014, 10:55: AM
answered-by-expert Expert Answer

Hypothalamus: Hypothalamus releases gonadotrophin releasing hormone (GnRH) which stimulates the anterior pituitary gland to secrete FSH, LH and progesterone.

 

Pituitary: Anterior pituitary gland secretes FSH to stimulate the growth of Graafian follicle, maturation of ovum and secretion of estrogen by follicle cells. It also secretes LH which stimulates release of ovum, formation of corpus luteum in the empty follicle and secretion of progesterone from the corpus luteum.

 

Ovary: The follicles in the ovary secrete estrogen which brings about growth and maturation of the reproductive tract and development of accessory sex characters. 

 

Pregnancy: Progesterone suspends ovulation during pregnancy, maintains foetal connection with the uterine wall and controls development of foetus in the uterus. Estrogen and progesterone stimulate the development of mammary glands during pregnancy. 

Answered by | 13 Jun, 2014, 12:55: PM
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