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Unformatted text preview: essed whcih turns the primordial gonads into the testes"
Y chromosome (SRY determining factor, in males
differentiation of internal organs,"up until three months after conception, fetuses contain both male wolffian system and female mullerian system
male testes release testosterone which promotes development of wolffian system and release anti-mullerian hormone which initiates the degeneration of the mullerian system
female ovaries ""do nothing"" -- in absence of testosterone and anti-mullerian hormone, wolffian system degenerates and promotes the development of the mullerian system"
androgen-insensitivy syndrom (AIS),"defective gene produces abnormal androgen receptors in a fetus that is generally a male
the wolffian system becomes blind to testosterone and other androgens and doesnt develop normally
anti-mullerian hormone prevents the development of the mullerian system
have no menstruation and are infertile
may not be found until puberty"
development of external gentialia,"males: masculinization of external genitalia requires stimulation by 5-alpha-dihydrotestosterone, a derivative of testosterone produced by the enzymes 5 alpha reductase
females: no hormonal signal is necessary for the development of females external ganglia"
congenital adrenal hyperplasia (CAH)Â ,"heritable condition in which the adrenal glands of the fetus release excess androgens
genetic females may have ambiguous external genitalia
females with CAH often describe themselves as a tomboy and are more likely to have bisexual or lesbian tendencies"
5-alspha-reductase deficiency,"heritable condition (first discovered in DR)
testosterone cant be converted to 5-alpha dihydrotestosterone
genetic males may have ambiguous external genitalia and are often raised female
development of secondary sex characteristics is controlled by testos."
development at puberty,"genitals and secondary sex characteristics mature
the mean age of puberty is dropping
1. hypothalamus releases GnRH
2. message to anterior pituitary gland:
---releases luteinizing hormone (LH)
---releases follicle stimulating hormone (FSH)
3. in males - LH message to testes: release testosterone
Â in females - FSH and LH control menstrual cycle 4. testosterone and FSH cause sperm to mature"
anabolic steroids,"synthetic steroid hormones
have some legitimate medical uses
build strength and muscle mass"
anabolic steroids side effects,"acne
enlargement of penis or clitoris
unusual hair growth or loss
breast enlargement in males
high blood pressure
sexually dimorphic nuclei,"located in the hypothalamus of the diencephalon of the forebrain
in rodents, it is the sexual dimorphic nucleus of the preoptic area (POA)
in humans, it is the interstitial nuclei of the anterior hypothalamus (INAH)"
what makes people "attractive" and "beautiful" to other people?,"symmetry
youthful characteristics in females
strong jaw and other indications of high testosterone in males
smell is associated with...
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This document was uploaded on 03/17/2014 for the course PSY 3 at UCSB.
- Fall '10