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Notes 3-27 & 4-3 Exam 3 Material

Notes 3-27 & 4-3 Exam 3 Material - Notes Start Exam 3...

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Notes 3-27-08 Start Exam 3 Material Weight Management Chapter 9 In 1990, every state had less that 14% obesity. In 2005, completely different picture. Americans Taller, Heavier: Average man 25 lbs heabier (191 lbs), 1.5 “ taller than 40 years ago Average woman 24 lbs heavier (164 lbs), 1” taller Average 10-year old 11 lbs heavier In 1995: 200 million obese adults worldwide In 2000: 300 million obese adults worldwide. OBJECTIVE 1: Explain fat cell development and its role in obesity. In a fat cell, as the central globule enlarges, the fat cell membrane expands to accommodate its swollen contents. In fat cell development, during growth, fat cells increase in number. When energy intake exceeds expenditure, fat cells increase in size. If energy intake continues to exceed expenditure, fat cells increase in number again. Weight loss decreases size of fat cells but not the number of fat cells total. This is one of the big problems with childhood obesity and why it is unlikely the issue of obesity will go away. OBJECTIVE 2: Describe factors that contribute to obesity including the role of genetics and the environment. Genetics Obesity generally not due to a genetic mutation Genetics may determine susceptibility to obesity. Determined from adoption studies. Obesity gene? Leptin Is a protein-hormone Produced by adipocytes (fat cells) Signals information about the amount of body fat Suppresses appetite so that o
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