Biopsychology Test Sexual Development and Behavior

• Sex-deteriminging Region of Y (SRY)
• codes for protein

• Found in Y chromosome
• contains coding for protein Testis-determining factor (TDF)
• or SRY protein...

Groups of cells that both male and females have prior to 6 weeks of fetal develpment

contains fetal cells that develope into female reproductive rogans (uterus vagina fallopian tubes)

• contain fetal cells that develop into male reproductive organs (seminal vesciles vas deferences)
• Differentiation occurs in the 3rd prenatal month

under influence of TDF protein their is development of testies. without development of ovaries

Testosterone.....enzyme....5-alpha reductace....converts to.....dihydrotestosterone......mullerian-inhibiting substnace

Testosterone and dihydrotestosterone are both needed for external and internal development

• converted from 5-alpha reductase and testostone
• stimulates wolffian duct. also stimulate growth of penis and scrotum in males

• released from testes: causes withering away of ovarium ducts. stops producution.
• if deactivated both systems will fully develop

occur prenatally fore people with long gesteration periods

triggers frther development in organism

• **organizational development**
• Physical sex characteristics

• **Activational effects**
• develop with puberty
• Female: widening of hips, body fat, etc
• Male: muscle growth,

Behavoir development occurs in animals. humans dont simply react to hormones because of our cognitive ability

Starts from Hypothalums...ends in Gonads

• Directly releases posterior putuitary horomns
• --vasopressin
• --oxytocin

gonadotropin-releasing hormone

• Gonadotropin hormones
• --follicle-stimulating hormone (FSH)
• --luteinizing hormone (LH)

• Released by the anterior pituitary
• part of the gonadotropin hormones
• initial development of egg and sperm in men and women

• Released by the anterior pituitary
• part of teh gonadotropin hormones
• increases production of progestrone (pregnancy hormone)

Extreme function in females...LH peaks and stimulates ovulation

• Androgesn (ie testosterone)
• Estrogesn (ie estradiol)
• Gestagens (ie progestorone)

Present in both males and females

• Aromatize testosterone into estradiol
• enzyme is Aromatase
• Alpha fetoprotein

• aids in masculination of the brain
• binds to circulating estradiol and prevents entry into brain

• 1. Intromition
• 2. Pelvic thrust
• 3. Ejaculation

• Involved in regulation of male sexual behavoir
• More sensitve and stimulated which leads to Intromition (intercoarse)
• Higher testosteron stimulates MPA

Signal willngness and acceptance of the BeEEf