FRHD 1010 Chapter Notes - Chapter 9: Programme For International Student Assessment, Water–Electrolyte Imbalance, Limbic System
7 Dec 2013
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Puberty: the time between the 1st onrush of hormones & full adult physical development. Many more years are required to achieve psychosocial maturity. Normally starts between 8-14 & follows a sequence. For girls, observable changes include nipple growth, then few pubic hairs, widening of hips, 1st period, full pubic hair & than breast growth. Average age of menarche (girls 11st period) among normal weight girls is about 12 years, 8months. For boys, usual sequence is growth of testes, initial pubic-hair, growth of penis, 1st ejaculation (spermarche), appearance of facial hair, peak growth spurt, deepening of voice & final pubic hair growth. Average age of spermarche is just under 13 years. Entire puberty process begins w/ invisible event, hormonal increase. Hormones: an organic chemical substance that"s produced by 1 body tissue & conveyed via the bloodstream to another to affect some physiological function.
