KNPE 237 Lecture Notes - Lecture 5: Hypothalamus, Insulin, Quartile
3 Oct 2016
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2 considerations: systems influenced by genetic and extrinsic factors. Important to understand the: average pattern of change within each system, range of individual variations for a system. Concept of rate limiters applies: a system that lags in development, e. g. , when you are learning to walk and your muscles are not strong enough muscle = rate limiter. Prenatally, the embryo has a cartilage model of the skeleton. Prenatal: ossification begins at primary centers in the mid-portions of long bones (starts in middle and grow outwards) Postnatal: growth in length occurs at secondary centers at the ends of the bones, appositional bone growth (slide 6) Internal and external influences (e. g. , internal = genetics, external = nutrition: example: tendons/overuse injury osgood-schlatter disease (osd) When teenagers hit growth spurts, and are engaging in sports that places a lot of strain on the knee all the time (e. g. , baseball) Over use and excess strain can cause injuries.
