1. Wellness II
Food and Nutrition

2. Objectives
Name the three classes of nutrients that supply your body with energy
Explain how the body obtains energy from foods
Describe the roles that carbohydrates, fats and proteins play in your body

3. Vocabulary
Nutrient- A substance in foods that the body needs to regulate bodily functions, promote growth, repair body tissue, and obtain energy
Metabolism- The chemical process by which the body breaks down food to release energy
Calorie- Unit for the amount of energy released when nutrients are broken down
Carbohydrate- A nutrient made of carbon, hydrogen, and oxygen that supplies energy

4. Fiber- A type of complex carbohydrate that is found in plants and is necessary for the proper functioning of the digestive system
Fat- A nutrient made of carbon, hydrogen, and oxygen; supplies energy, forms cells, maintains body temperature, and protects nerves
Unsaturated fat- A fat with at least one unsaturated bond in a place where hydrogen can be added to the molecule
Saturated fat- A fat that has all the hydrogen the carbon atoms can hold

5. Cholesterol- A waxy, fatlike substance that is found only in animal products
Trans fat- The type of fat produced when manufacturers add hydrogen to the fat molecules in vegetable oils
Protein- A nutrient that contains nitrogen as well as carbon, hydrogen and oxygen; needed for the growth and repair of body tissue
Amino acid- small units that are bound together chemically to form proteins

6. Carbohydrates Simple carbohydrates; also known as sugars.
Two types:
Simple carbohydrates; also known as sugars.
Sugars occur naturally in fruits, vegetables and milk.
They are added to many foods like cookies, candies and soft drinks.
Several types of sugars, but glucose is the most important because it is the major provider of energy for your body’s cells. All other types of sugar are converted to glucose once they are inside your body.

7. Complex carbohydrates
Made up of sugars that are linked together chemically to form long chains, something like beads in a necklace.
Starches are one of the main types of complex carbs.
They are found in many plant foods, including potatoes and grains. Rice, oats, corn and wheat are grains.
Tortillas and whole wheat roles are excellent sources of starch.
When you eat food containing starch, your digestive system breaks the starch into simple sugars that can be absorbed into your bloodstream.

8. Energy Reserves
You usually eat more carbohydrates then your body can immediately use.
This causes extra glucose to be converted into a type of starch called glycogen, which is stored in your body.
When your body needs more glucose, the glycogen is converted back into glucose.
If you eat so many carbs that your body’s glycogen stores are full, the excess carbs are stored as fat.

9. Fats Fat has twice as many calories as carbohydrates
Unsaturated Fats (healthier fats): Liquid at room temperature; these fats are found in vegetable oils, nuts and seeds.
Monounsaturated & polyunsaturated fats
Can help fight heart disease
Saturated Fats (NOT GOOD): Solid at room temperature; animal fats, such as lard, and dairy products
To much in your diet can lead to heart disease
Trans Fats (THE WORST): Found in margarine, chips and commercially baked goods.
- Manufactures add hydrogen to the fat molecules in vegetable oils to create trans fat

10. Protein
Most important function of proteins is their role in the growth and repair of your body’s tissues
High protein foods include meats, eggs, poultry, milk and milk products
Nuts, dried beans, dried peas and lentils also contain a lot of protein

11. Name the three classes of nutrients that supply your body with energy
Carbohydrates – supply energy for your body’s functions
Fats- supply you body with energy, form your cells, maintain body temperature, and protect your nerves
Proteins- serve as a source of energy. Most important function is their role in the growth and repair of your body’s tissues

12. Explain how the body obtains energy from foods
When your body uses the nutrients in foods, a series of chemical reactions occur inside your cells. As a result, energy is released.
Metabolism is the chemical process by which your body breaks down food to release this energy. Metabolism also involves the use of this energy for the growth and repair of body tissue.

13. Describe the roles that carbohydrates, fats and proteins play in your body
Carbohydrates, fats and proteins can all be used by the body as a source of energy.