PSYC 3300 Lecture Notes - Lecture 2: Allosome, Epididymis, Typical Male
16 Apr 2013
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Sex chromosomes: male: xy, female xx, indifferent gonad develops. Male: h-y antigen influences the gonad tissue into embryonic testes (if there is a y) Female: gonad tissue is organized into ovaries (if there is no y, hormones. Female: ovaries secrete estrogens and progesterone. Hormones can be produced by testes, ovaries, adrenal glands. Male: vas deferens, epididymis, seminal vesicle, testes. Until 8th week the external genitalia of both sexes appear identical. Females: clitoris and labia: areas of the brain. Human studies: sexually dimorphic nucleus (sdn) is a part of the preoptic area (poa) of the hypothalamus. Sdn part of hypothalamus (controls secretion of hormones) The function of this part of the brain is not clear. May be responsible for sexual and maternal behaviour. True gonadal intersex: one ovary and one testis. 46xx: ovaries and partial male genitalia (except testes) eg cah (internal female, external male) 46xy: testes and partial female genitalia (except ovaries) (internal male, external female)
