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Food and Nutrition 38-1.

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Presentation on theme: "Food and Nutrition 38-1."— Presentation transcript:

1 Food and Nutrition 38-1

2 Food and Energy Why do you need to eat food?
To obtain energy!! The energy available in food can be measured by burning it. When you burn it the energy is converted to heat which can be measured. Calorie is equal to 1000 calories,

3 The amount of heat needed to raise the temperature of 1 gram of water by 1 degree Celsius is called a calorie Dietary calories is represented with a capitol C. Calorie is equal to 1000 calories The science of nutrition is the study of food and its effects on the body

4 Nutrients Nutrients are substances in food that supply the energy and raw materials your body uses for growth, repair, and maintenance. Nutrients the body needs are water, carbohydrates, fats, proteins, vitamins, and minerals

5 Water Water is the most important nutrient
Every cell in the human body needs water because many of the body’s processes, including chemical reactions, take place in water Humans need to drink at least 1 liter of water each day to avoid being dehydrated.

6 Carbohydrates Carbohydrates are the main source of energy for the body
Simple sugars are smaller molecules (monosaccharide and disaccharides) found in fruits, honey and sugar cane Complex carbohydrates are larger molecules (polysaccharides) found in potatoes, grains, and vegetables These get broken down into simple sugars

7 Fats Fats or lipids are an important for making cell membranes, myelin sheaths, and certain hormones. Consuming more fat than you need can lead to high blood pressure, heart disease, obesity, and diabetes.

8 Proteins Proteins supply raw materials from growth and repair of structures such a skin and muscle. Proteins are also involved in regulatory and transport functions Examples include insulin, a hormone that controls blood sugar levels and hemoglobin which helps the blood transport oxygen

9 Vitamins Vitamins are organic molecules that help regulate body processes often working with enzymes Vitamins obtained from food we eat

10 Minerals Minerals are inorganic nutrients that the body needs, usually small amounts Examples are calcium, iron, and magnesium

11 Nutrition and a Balanced Diet
The basic idea behind a balanced diet is to eat a variety foods each day and limit your intake of fatty, sugary foods

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