Question

In: Biology

Complete the table with adult male reproductive hormone signaling information. GnRH FSH LH testosterone Stimulus Source...

  1. Complete the table with adult male reproductive hormone signaling information.

GnRH

FSH

LH

testosterone

Stimulus

Source

Target

Action

Regulation of hormone

Solutions

Expert Solution

Hormone Stimulus Source Target Action
GnRH Kisspeptin Signalling GnRH neurones of hypothalamus

anterior pituitary gland (Gonadotroph cells)

 Stimulates the secretion of FSH and LH
FSH GnRH gonadotropic cells of the anterior pituitary gland

Sertoli cells (in males), Ovarian follicular cells, granulosa cells (in females)

Maturation of primordial germ cells,  Induces Sertoli cells to secrete ABP,  Initiates follicular growth in the ovaries
LH GnRH gonadotropic cells of the anterior pituitary gland

Leydig cells (in males), ovarian follicular cells (in females)

 Ovulation (LH surge), production of Testosterone and estrogen
Testosterone FSH and LH (mainly) Leydig cells in the testis

Male primary and secondary sex organs, muscles, vocal cord etc.

 development of male reproductive tissues (Testis, prostate etc), secondary sexual characteristic (increased muscles, bone mass and beard), regulates fertility (sperm production)

regulation of these hormones are related to each other. They either regulate the production of one another in feedback mechanism (positive or negative). GnRH helps in secretion of FSH and LH and these two again leads to production of testosterone and estrogen. Testosterone and estrogen suppress the further production of GnRH (along with FSH and LH) in feed back mechanic. It has also been shown that estrogen helps in production of LH causing LH surge (positive feedback).

gladiator answered 2 years ago
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