Sex change - Chemical Sex Changes Male and Female Sexual...

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Chemical Sex Changes? Male and Female Sexual Development Endocrine Disruption Types of Disruptors Environmental Examples Human Implications Summary and Conclusions
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Some Important Definitions Genotypic sex – defined by the X and Y chromosomes. Phenotypic sex – physical expression of sexual characteristics. Endocrine system – hormones which control many activities, including development, reproduction, and behavior. Xenoestrogen – a foreign chemical with estrogenic properties. Xenoandrogen – a foreign chemical with androgenic properties.
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The Steroid Hormones Steroid hormones are naturally synthesized from cholesterol. Control female and male reproduction.
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Actions of Hormones and their Mimics Endocrine disruption – deleterious effect of a foreign substance that mimics or blocks the action of the natural hormone.
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Functions of Testosterone in Males Stimulate spermatogenesis in the testicles. Stimulate development of secondary sexual characteristics (muscle mass, hair growth, deep voice). Stimulate development of support organs (prostate, seminal vesicles, cowpers glands).
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