Psych 304 Lecture Notes - Jan.20th

Psych 304 Lecture Notes - Jan.20th - Psych 304 Lecture...

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Psych 304 Lecture Notes Jan.20 th , 2009 - during puberty, body starts transforming itself & becomes fertile (over the course of a few years, secondary sex characteristics develop) - sex hormones are responsible (testosterone, estrogen, etc.) - secondary sex characteristics of males & females: - males: hair line recession begins, pubic hair appears, reproductive organs grow, larynx enlargement, facial & body hair appears, acne appears, auxiliary hair appears, etc. - testosterone is responsible for enlargement of the muscles in males - females: menstruation begins, pubic hair appears, etc. - estrogen is responsible for distribution of body fat in females - effects of testosterone & estradiol: - genital growth - closure of epiphysis (tips of bones) → leads to stopping of skeletal growth - testosterone only: growth of facial, axillary* & pubic hair; lowering of the voice; alters hairline on the head; stimulates muscular development - estradiol only: *androstenedione in females; breast development (estrogen: testosterone ratio responsible); changes in body fat deposition - if woman doesn't have enough body fat, no cholesterol will be present to make sex hormones & woman will stop menstruating; if man doesn't have enough body fat, no cholesterol will be present to make sex hormones & production of sperm will stop - body temperature during menstrual cycle: - body temp is lower at beginning of menstrual cycle - during ovulation, there is an increase in body temp - body temp must be taken in the morning while still lying in bed therefore hard to get average measurement of body temp during menstrual cycle & rely on body temp to determine where in cycle woman is - Handout: “Four phases of human sexual response in males & females” - data from Masters & Johnson - vasocongestion (increase in blood flow) & myotonia during excitement phase - conclusion: males & females have very similar sexual responses - both men & women are capable of multiple orgasms - more variations to this model among women than men - Sex hormones: - 1. Testosterone and aggression: - What is its biological foundation in humans? There is no explanation linking testosterone & aggression in humans. Children have no circulating testosterone, but still can act very aggressively. -
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Psych 304 Lecture Notes - Jan.20th - Psych 304 Lecture...

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