HDE 100B Lecture Notes - Lecture 1: Asthma, Advantageous, Melatonin
25 Sep 2016
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Document Summary
Puberty comes from the latin word pubertas (adult) Feedback loop (hpg axis) set point (ex: thermostat: hpg axis: hypothalamus, pituitary gland (master gland), and. The hypothalamus monitors levels of androgens and estrogens. Females can hit puberty earlier if in the presence of non-familial males: nutritional resources. Prenatal hormones program the brain to be masculine or feminine (like setting an alarm clock: different areas of the brain are activated. Patterns of behavior as a result of this organization may not appear until adolescence. Ex: sex differences in aggression: activating role. Increase in certain hormones at puberty activates physical changes (e. g. , secondary sex characteristics) Timing of physical changes in adolescence vary by: regions of the world (earliest in northern europe; latest in some african countries, historical era (puberty is earlier than before from secular trend) Ex: menarche (first menstruation) us average 12 to 13 years vs lumi (new guinea) average > 18 years.
