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Chapter 10
Lesson 1
Why do you Eat?
Nutrients: substances in food that your body needs to function properly to grow, to repair itself, and to supply you with energy.
Nutrients in food affect all sides of your health triangle. Mental: how you feel Social: how you function and act each day each
day Physical: how you grow and look
Physical Need
Eating habits stem from both a physical need for food and the psychological desire for food.
Food, air, and water are life’s basic needs. Hunger is a natural drive that protects you from
starvation Empty stomach Walls contract, stimulating nerve endings Nerve endings signal your brain to eat After you eat the walls of the stomach are stretched and
nerve endings are no longer stimulated By eating you satisfy the physical need for food. You
feel “full”
Psychological Desire
Mind’s desire for food Eating in response to appetite rather then
hunger Appetite is the desire, rather than a need, to
eat Learned Shaped by environment and emotions
Environment
Culture Food choices reflect the culture you live in as well
as your ethnic background and perhaps your religious beliefs
Picnics, movies, ball games, holidays Teenagers have a culture of their own, eating
practices seem to be part of it.
Environment Cont.
Family and friends Likes and dislikes from childhood will
influences food decisions throughout life As you grow older, friends will influence your
food choices Trying new food at social gatherings, or foods
at friends home
Environment Cont.
Advertising Food ads are everywhere Make you aware of certain foods They try to persuade you of their benefits
and/or taste Some claims of benefits are misleading you
need to listen and judge advertising messages carefully
Environment Cont.
Time and money Taste and nutrition are the top 2 factors that
influence food shopping Cost, convenience, and food safety come
next Busy life styles = easy to cook and eat foods,
microwavable food Cost affect food choices = nutritious food is
pricey
Emotions
Boredom Stress Frustration Depressed Eating to relieve tension or boredom can
result in overeating Some loose their appetite when they are
upset or bored as a result they miss out on important nutrients
Your Eating Habits
Many people are unable to distinguish between appetite and hunger
They eat past the point of feeling full because their appetite continues to be stimulated after their hunger has been satisfied
Many foods that stimulate the appetite are high in fat and calories
Nutrition Throughout Your Life Nutrition is the process by which the body
takes in and uses food Getting nutrients your body needs enables
you to have energy, feel and look your best and stay mentally alert
Good nutrition can help prevent chronic diseases such as heart disease, certain cancers, diabetes, and stroke
Nutrition Throughout Your Life Adolescence is one of the fastest periods of
growth During this time the body needs more energy
from food and has higher nutrients needs than ever
In spite of this teens skip meals and make poor food decisions
Week long Assignment
Keep a daily detailed food log for 1 week: Times of the day you eat & drink. What you eat & drink. Organized, days, dates, times, and intake. Due Wednesday 2/19 (Project Grade)