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Human Development notes 12

Human Development notes 12 - Physical Developmentin...

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Click to edit Master subtitle style  2/10/11 Physical  Development in  Adolescence
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 2/10/11 Adolescence The transition between childhood and  adulthood. Early adolescence  11-14 years Late adolescence  15-19 years  Puberty Lots of biological events that lead up to an adult-size  body and sexual maturity. 
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 2/10/11 Perspectives on Adolescence Historical perspective Social and legal reforms changed the way we defined  adolescence. EX: Laws distinguishing adults from juveniles There was a postponement in adult responsibilities. Biological perspective View that puberty =  heightened emotionality, conflict, and  defiance.
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 2/10/11 Perspectives on Adolescence Cultural/Social perspective Rites of passage EX:  driver’s license, Bar/Bat Mitzvah Different thoughts on adolescence.  US teens are expected to act independently Chinese teens are expected to be dependent on family  and community. In less industrialized countries: Adolescence is brief.
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 2/10/11 Brain Development Pruning  Continues and leads to greater specialization Related to improvements in cognitive functioning. Neurons are more sensitive to neurotransmitters. Experiences are more intense.  Pleasure and novelty seeking occurs which tends to lead to  an increase in taking drugs. Several systems experience changes. Amygdala-  Fear and anger.
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 2/10/11 Hormonal Changes Starts by ___8 or 9______ years. Major changes are caused by secretions of  growth hormone and thyroxine. Sex hormones Estrogens-  More in girls Androgens- More in boys; specifically testosterone. Girls and boys have both types of sex hormones.  
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 2/10/11 Growth spurts Affects all parts of the body but different parts  grow at different rates. Hands, feet, head and nose grow more quickly. Body proportions change and become more  sexually defined. Girls  Starts around 10; tapers off around 13. Menarche The onset of the menstrual cycle 
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Sex Differences in  Body Growth in Adolescence Boys Girls Growth Spurt Starts age 12 ½ Starts age 10 Proportions Shoulders broaden Longer legs Hips broaden Muscle-Fat Makeup Gain more muscle, aerobic efficiency Gain more fat
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 2/10/11 Puberty __Reproduction__ becomes possible.
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