Animal reproduction - The interplay of tropic and sex hormones regulates mammalian reproduction
6 important questions on Animal reproduction - The interplay of tropic and sex hormones regulates mammalian reproduction
What hormones, from both male and female, govern the human reproduction?
Hormones from:
- The hypothalamus
- The anterior pituitary
- The gonads
What hormone(s) does the hypothalamus secrete?
Gonadotropinreleasing hormone (GnRH) --> this hormone stimulates the anterior pituitary to secrete gonadotropin hormones.
During puberty what sex hormone in males develops what secondary sex organs?
Antrogens:
- causes the voice to deepen
- causes facial and pubic hair and muscles to grow.
- Increase general aggressiveness
- promotes specific sexual behavior and sex drive.
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During puberty what sex hormone in females develops what secondary sex characteristics?
Estradiol
- stimulates breast and pubic hair development
- influences sexual behavior
- increases fat deposition in breast and hips
- increases water retention
- alters calcium metabolism
What cells in the male reproductive system does FSH influence?
It promotes the activity of the Sertoli cells that produce inhibin and promote spermatogenesis by nourishing the developing sperm.
What negative feedback mechanisms control sex hormone production in males?
- Testosterone regulates blood-levels of GnRH, FSH, and LH by effecting the hypothalamus and the anterior pituitary.
- Inhibin, acts on the anterior pituitary gland to reduce FSH secretion.
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