Nutrition_36

Nutrition_36 - digestion & nutrition Chapter 36 outline...

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Chapter 36
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outline Nutrition introduction Nutrition requirements Nutritional disorders
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Nutrition Required for homeostasis Provides energy for cellular work Provides materials body cannot manufacture- monomers, minerals, vitamins Heat for body temperature maintenance Measured in calories 1 gram 1c Measures amount of energy in food source Different food sources hold different energy values
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Metabolic rate D= Rate of energy consumption Basal metabolic rate (bmr) Maintain just body function Ave 1300-2000 kcal/day Will vary amongst individuals based on a variety of factors Age -size Sex -stress Exercise -sleep Genetics
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Thin Craze 95% women report disgust with body Fashion models weigh 23% less than average woman Thin represents Attractiveness, control, sucess
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Thin Craze
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Thin Craze goes both ways. .
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Nutritional disorders Malnutrition Obesity
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Malnutrition D= deficiency in 1+ essential nutrients Inadequate food intake or disease Body breaks down to fuel metabolism 800m worldwide 75% of americans do not meet their RDA Lack of education Children greatest impacted group Protein deficiency Main source of complete food sources expensive
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Being Skinny is NOT healthy
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Anorexia Highest death rate of any psychological disorder Low blood pressure, bone loss, kidney, liver, heart damage
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Obesity D= Inappropriate high ratio of weight to height Eating disorder of developed nations- over nourishment ¼ of Americans 1992-2006 obesity in Americans increased from 22.9 to 30.5% Child obesity doubled since 80s Health risks Cardiovascular disease- Heart attack Diabetes- type II Cancer
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Arthrosclerosis
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Diabetes Type II Most common form of diabetes 90-95% of diabetes cases Insulin deficiency or insulin resistance Insulin important in glucose transport from blood to cells Associated with Obesity, high blood pressure, abnormal cholesterol levels, heart disease, polycystic ovarian syndrome
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Food “Addiction” ? Similar neural pathways as drugs high-fat foods stimulate opioids or 'pleasure chemicals' in the brain. Dopamine reward system Dopamine released when food eaten Rewards body for survival enhancing behaviors Obese reduced number of dopamine receptors Similar to drug addiction alters of brain chemistry Lab rats Diet 25% sugar Withdrawal symptoms Shakes, teeth chattering
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Chocolate Addiction? Contain compounds that mimic psychoactive drugs Contain cannabinoids Result in Heightened sensitivity and euphoria
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Hormone imbalance Leptin regulates food consumption Inhibitory effect on eating Monitors fat reserves Rise in fat levels reduce response to leptin Difficult for overweight person to lose weight (drop in leptin triggers starvation response)
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This note was uploaded on 12/12/2011 for the course BIO 10 taught by Professor Staff during the Fall '11 term at Mesa CC.

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Nutrition_36 - digestion & nutrition Chapter 36 outline...

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