SCIENCE 10-4: NUTRITION

QUESTIONS YOU WILL ANSWER:

1. What are nutrients? Where do nutrients come from?

2. What are the short-term and long-term consequences of too many or too few nutrients?

3. How can individuals make healthy eating and lifestyle choices

WHAT ARE NUTRIENTS?• Nutrients are substances found in food• Nutrients provide nourishment to your body• 6 main types of nutrients:

– carbohydrates– fats– proteins– vitamins– minerals– water BrainPOP: nutrition

• Nourishment and energy contained in food helps the body to keep cells, tissues and organs healthy.

• In order to stay healthy, animals must consume a mixture of foods and drinks that supply enough nourishment and energy to their bodies.

ROLES & SOURCES OF NUTRIENTS

CARBOHYDRATES• Sugars and starches are

the main source of energy for the body

Sources:– rice, bread, cereal, potatoes,

pasta

FATS• Stored in the body as

energy source when carbohydrates are in short supply

Sources:– red meat, dairy, nuts, oils

ROLES & SOURCES OF NUTRIENTS

PROTEINS• Build and repair body

tissue

Sources:– meat, eggs, dairy, beans,

nuts

VITAMINS• Help carry out life

functions like growth and reproduction

Sources:– fruits and vegetables

ROLES & SOURCES OF NUTRIENTS

MINERALS• Important to strong bones

and teeth. Also help carry out life functions

Sources:– dairy, fruits and vegetables

WATER• Helps carry out life functions,

moves nutrients and waste products

Sources:– beverages, foods high in water

like fruits and vegetables

MALNUTRITION

• Malnutrition occurs when nutrients are missing from a diet.

• Can occur when people:–eat too little–make poor eating choices

DIETS

• “Diet” refers to the amount and type of food you eat.

• A mixed diet contains a wide variety of foods:– grain products– fruits & vegetables– milk products– meat & meat alternatives

DIETS

• A vegetarian diet lacks meat products• Vegetarian diets:

–high in fibre–low in fat–may lack vitamins–may lack calcium

DIETS

• A “fad diet” refers to a current diet craze• Fad diets usually involve weight loss• Examples:

–cabbage soup diet–grapefruit diet–Atkins diet–Caveman diet

Caveman Diet

CANADA'S FOOD GUIDE

• Canada’s Food Guide helps Canadians make healthy choices

• Five guidelines:– Eat a variety of foods– Eat whole grains, fruits

and vegetables– Chose low fat foods– Participate in physical activity– Limit salt, sugar, alcohol

and caffeine intake

Canada’s Food Guide

SURVEY

Take the anonymous survey related to your lifestyle and eating habits!

Take the survey HERE!