1. Food and Your Body Weight
Chapter 8 – Section 1
Food and Your Body Weight

2. 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.

3. 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.

4. Why Do You Eat? Hunger vs. Appetite
Physiological needs vs. learned behavior

5. Satiety Full feeling Stomach stretches Nerves sense the stretch
Signal to brain
Stop eating

6. Food factors – Why we choose what we eat.
Smell & Taste
Mood
Family Traditions
Ethnic Background
Social Occasions
Religious Traditions
Health Concerns
Cost & Availability

7. Food Provides Energy - Calories
Carbs/Proteins = 4 calories per gram
Fats = 9 calories per gram

8. Energy Usage Body takes its needs Excess Glycogen - Glucose
Fat – Long term storage

9. Breakfast…the most important meal of the day
10+ hours since last meal
Stored energy
Inefficient
Hunger is a Distraction

10. How Much Energy Do You Need?
Basic needs
Breathing
Blood Circulation
Growing
Basal Metabolic Rate (BMR)
Everyone is different.

11. Balancing Energy Intake with Energy Used
Energy Balance
Calories in
Energy out

12. Body Fat Percentages Insulation & Energy Men = 12% to 20%
Women = 20% to 30%

13. Overweight & Obese: A growing problem
Why is being overweight a common problem in developed countries?
Hint

14. Why are we so overweight?
Lack of exercise
Cars
Computers
TV’s
Diet
Eating out
Vending Machines

15. What are the risks of obesity?
Heart Disease
High Blood Pressure
Cancer
Type 2 Diabetes
Sleep Apnea

16. What can be done? Exercise Healthy Diet 20 to 30 minutes a day
Balanced diet
Moderate portions
Don’t eat after 9:00 at night
Eat breakfast

17. Homework
Read Pages
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