PSYC 2850 - Human Sexuality - Class 4

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Department
Psychology
Course
PSYC 2800
Professor
Thisis P S Y C2850- Human Sexuality N O T P S Y C2800
Semester
Winter

Description
February 9 2011Mens BodiesGametic SexSperm consists of a head nucleuscontains DNA and acrosomebinding and breaking down the outer portion of the egg cell a midpiece portion of the sperm cell that produces energy for the sperm cell to travel a tailSpermatogenesis generation of spermSperm are infiniteGonadal SexTestes produce sperm and are adaptively designed to do soExternal portion of the abdominal cavity to optimize temperature and sperm productionDartosmuscle connected to scrotum that contracts to regulate temperatureSpermatic cordconnector to abdominal cavityTestes sizebased on androgens during prenatal developmentTypically left testicle hang lower and right testicle is largerSmaller right testicle better at cognitive tasksSpermatogenesisOccurs in the seminiferous tubulesSertoli cells produce sperm inside seminiferous tubulesLeydig cells interstitial in seminiferous tubules produce testosterone which initiates spermatogenesisSperm cells mature and are stored in the rete testisexists between seminal vesicles and epididymis and the epididymisback side of each testicle can be up to 4 million mature sperm in the tail of the epididymisTestes produce sex steroid hormonesAndrogensTestosterone masculines the body elevate libidoProduced most frequently by the testesEstrogensMaintaining bone density long bone growthImportant in concentrating spermProgestinsBlood clotsGonadotropins influence spermatogenesisLow TIncrease GnRHIncrease FSH and LHIncrease FSHIncrease spermatogenesis by sertoli cellsIncrease LHIncrease T production by Leydig cellsHigh levels Tdecrease GnRHTestes size varies crossculturallyRelative to the individuals body sizeNigeria 5262 gramsHong Kong 177 grams
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