Podcast
Questions and Answers
What is the primary function of GnRH?
What is the primary function of GnRH?
Inhibin is produced in the testes to stimulate FSH production.
Inhibin is produced in the testes to stimulate FSH production.
False
What hormone is primarily responsible for stimulating sperm production in the testes?
What hormone is primarily responsible for stimulating sperm production in the testes?
FSH
In the hypothalamic-pituitary-gonadal axis, high levels of ______ inhibit further release of GnRH.
In the hypothalamic-pituitary-gonadal axis, high levels of ______ inhibit further release of GnRH.
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Match the hormone with its site of action:
Match the hormone with its site of action:
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Study Notes
Hormones
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GnRH: Produced by the hypothalamus; acts on the anterior pituitary gland, stimulating the release of FSH and LH.
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FSH: Produced by the anterior pituitary; acts on Sertoli cells in the testes, supporting sperm production (spermatogenesis) in seminiferous tubules; secretes inhibin to regulate hormone levels.
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LH: Produced by the anterior pituitary; acts on interstitial cells in the testes; causes these cells to produce more testosterone, released into the bloodstream until the hypothalamus detects high testosterone.
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Inhibin: Produced in the testes; regulates FSH; when there is a high level of FSH, the anterior pituitary is signaled to decrease the production of FSH.
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Testosterone: Produced in the testes; secreted into the bloodstream; supports spermatogenesis by acting on Sertoli cells; develops and maintains secondary sexual characteristics.
Hormone Regulation
- Negative Feedback: High levels of testosterone signal the hypothalamus to stop producing GnRH, which in turn decreases LH and FSH production, regulating hormone levels. Low sperm count and inhibin levels cause the hypothalamus to increase GnRH levels leading to higher FSH and LH production.
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Description
Explore the functions of key hormones involved in the regulation of the reproductive system, including GnRH, FSH, LH, inhibin, and testosterone. This quiz covers how these hormones interact and their role in spermatogenesis and feedback mechanisms. Test your knowledge on hormone production and regulation.
