HUMB0002 Chapter Notes - Chapter 1: Homeostasis, Dna Replication, Prenatal Development
Document Summary
Gradual developmental change, growth, maturation, ageing death. The reversal of entropic trend requires persistence of a form, achieved by either stability (eg carbon) or replication. Embryological development series of simple sequential steps, each dependent on the previous. Lineage of dependency is critical as a concept. Prenatal growth placental growth important early, rapid relative growth in 2nd trimester (45 . 800g), rapid absolute growth in 3rd trimester (800 3400g). Growth curves distance vs velocity for height + weight. Postnatal growth in height declining velocity continues until adolescent growth range in ultimate height is relatively narrow. Postnatal growth in weight weight velocity declines more quickly than height. Adolescent growth spurt for weight lags behind that for height (~ 3 months) ultimate weight attained is much more variable than height-attained. Adolescent growth dramatic change in velocity of growth for ~2 years. Variable onset leads to misleading pattern in population growth curves.
