HNF 150 Exam 3 Review

HNF 150 Exam 3 Review - NUTRITION EXAM 3 REVIEW State the...

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NUTRITION EXAM 3 REVIEW State the three components of body’s energy expenditure and how much each contribute to energy expenditure o 5-10% thermic effect of food o 25-50% physical activity o 50-65% BMR (basal metabolic rate) Describe the roles of BMR and several other factors in determining an individuals daily energy needs o Help to sustain life including circulation, respiration, temperature maintenance, hormone secretion, nerve activity, and new tissue synthesis but does not aid digestion and voluntary activities o Factors determining an individuals daily energy needs Gender—women generally have less lean body mass than men; in addition, women’s menstrual hormones influence the BMR, raising it just prior to menstruation Age—the BMR declines by an average of 5% per decade Physical activity—activities are grouped according to their intensity Body size and weight—the height BMR taller and heavier people calls for height and weight to be factored in when estimating a persons EER Growth—the BMR is high in people who are growing, so pregnant women and children have their own sets of energy equations Discuss the potential impact of outside the body factors on weight-control factors o Over past decades, the abundance of food has increased enormously while the daily demand for physical activity for survival has all but disappeared todays food energy intakes alone account for the rise in US obesity rates. Identify how many calories equal a pound of body fat and be able to calculate weight gain given excess calories o 3500 calories = 1 pound of fat Energy Balance Describe the functions of ghrelin and leptin in the body o Ghrelin—a hormone released by the stomach that signals the hypothalamus of the brain to stimulate eating. Higher before meals to increase appetite o Leptin—an appetite suppressing hormone produced in the fat cells that conveys information about body fatness to the brain; believed to be involved in the maintenance of the body’s composition. Higher after meals to increase satiety Compare and contrast the characteristics of anorexia nervosa, bulimia nervosa,, and binge eating disorder o Anorexia Nervosa—an eating disorder characterized by a refusal to maintain a minimally normal body weight, self starvation to the extreme,
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and a disturbed perception of body weight and shape; seen usually in teenage girls and young women o Bulimia Nervosa—recurring episodes of binge eating combined with morbid fear of becoming fat; usually followed by self induced vomiting or purging o Binge Eating Disorder—an eating disorder whose criteria are similar to those of bulimia nervosa excluding purging or other compensatory behaviors Weight and Health o State the health risks associated with low and high BMI, different types of body fat distribution, cardiovascular fitness and healthy eating. Defend the importance of behavior modification in weight loss and weight maintenance over the long term.
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This note was uploaded on 04/02/2012 for the course HNF 150 taught by Professor Thurston during the Fall '07 term at Michigan State University.

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HNF 150 Exam 3 Review - NUTRITION EXAM 3 REVIEW State the...

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