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Chapter 8 – Section 1
Food and Your Body Weight
Key Terms
Hunger – the body’s physical response to the need for food.
Appetite – the desire, rather that the need, to eat certain foods.
Basal Metabolic Rate (BMR) – the minimum amount of energy required to keep the body alive when in a rested and fasting state.
Key Terms con’t.
Overweight – being heavy for one’s height.
Obesity – having excess body fat for one’s weight; the state of weighing more than 20% above your recommended body weight.
Why Do You Eat? Hunger vs. Appetit
e Physiological needs
vs. learned behavior
Satiety Full feeling Stomach stretches Nerves sense the
stretch Signal to brain Stop eating
Food factors – Why we choose what we eat.
Smell & Taste Mood Family Traditions Ethnic Background Social Occasions Religious Traditions Health Concerns Cost & Availability
Food Provides Energy - Calories Carbs/Proteins = 4 calories per gram Fats = 9 calories per gram
Energy Usage Body takes its
needs Excess
Glycogen - Glucose Fat – Long term
storage
Breakfast…the most important meal of the day
10+ hours since last meal
Stored energy Inefficient Hunger is a
Distraction
How Much Energy Do You Need?
Basic needs Breathing Blood Circulation Growing
Basal Metabolic Rate (BMR) Everyone is
different.
Balancing Energy Intake with Energy Used
Energy Balance Calories in Energy out
Body Fat Percentages Insulation & Energy Men = 12% to 20% Women = 20% to
30%
Overweight & Obese: A growing problem
Why is being overweight a common problem in developed countries?
Hint
Why are we so overweight? Lack of exercise Cars Computers TV’s Diet Eating out Vending Machines
What are the risks of obesity? Heart Disease High Blood
Pressure Cancer Type 2 Diabetes Sleep Apnea
What can be done?
Exercise 20 to 30 minutes a day
Healthy Diet Balanced diet Moderate portions Don’t eat after 9:00 at night Eat breakfast
Homework
Read Pages 190 -195 Section Review Page 195 #’s 1, 3, 4,
6, 7, 8, & 9 Chapter Review Page 212 #’s 3, 4, &
5 Pre-read Section 2, pages 196 - 201
