NS 115 - Lecture 21 - Lecture 21 Environmentally Induced...

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Lecture 21 – Environmentally Induced Eating pt. 2 October 22, 2008 Evidence of Biological Theory of Eating o No feedback from fat identified o Biological signals are not specific for eating behavior o Small yearly energetic error does not mean there is physiological regulation o Humans don’t respond to food deprivation by eating o Humans don’t respond to overfeeding by eating less o About half the variance of body weight is due to genetics o Little evidence that early nutrition affects adult body weight Early Development o Adipose cells remain fairly constant across a lifetime When lose weight: adipose cells get smaller (but they don’t go away) o Two kinds of obesity Hyptertrophic – adult onset (most closely linked to diabetes, increased size in adipose cells) become less sensitive to insulin Hyperplastic – child onset (increased number of these cells leads to increased weight) Correlation in the 50s between childhood weight and adulthood weight Adolescent obesity becomes an excellent predictor of adult obesity o
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This note was uploaded on 02/22/2010 for the course NS 1150 taught by Professor Levitsky during the Fall '05 term at Cornell University (Engineering School).

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NS 115 - Lecture 21 - Lecture 21 Environmentally Induced...

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