Explain how food provides energy?

Answer 1

Food energy is the amount of energy in food that is available through digestion. The values for food energy are expressed in kilocalories (kcal) and kilojoules (kJ).

One large calorie or food calorie is the amount of energy (heat) to raise the temperature of one kilogram of water one degree Celsius. Some advocate the convention of the capitalizing the C in these so that one Calorie is equal to 1000 lowercase calories, but that is not a convention generally followed, and it is useless when the word starts a sentence. The large calorie is sometimes abbeviated kcal, to indicate that is 1000 times as large as the calorie. Consequently, the prefix kilo- is not used with the large calories outside that use in the symbol. Food calories might be called kilocalories on the basis of the small calorie usage, but the term kilocalorie is never used 1,000 large calories.

The International System of Units unit kilojoule is becoming more common. In some countries (Australia, for example) only the kilojoule is normally used. Some types of food contain more food energy than others: fats and sugars have particularly high values for food energy. One Calorie is approximately equal to 4.1868 kilojoules.

You could get more information from the link below...

Answer 2

Food That Provides Energy

Answer 3

Food provides energy to the body through the Digestive System.

This is how it works:

When we eat such things as bread, meat, and vegetables, they are not in a form that the body can use as nourishment. Our food and drink must be changed into smaller molecules of nutrients before they can be absorbed into the blood and carried to cells throughout the body. Digestion is the process by which food and drink are broken down into their smallest parts so that the body can use them to build and nourish cells and to provide energy.

http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd/

Answer 4

Energy is stored in chemical bonds. As chemical bonds in glucose are broken during cellular respiration in cells mitochondria, energy is released which then is used to change ADP to ATP. ATP is like currency of the cells. The energy stored in food has to be changed to ATP before it can be used by a cell. Once ATP is produced, the energy of the food can then be used by the cells to do work and produce heat.

Answer 5

food is complex material,,,,,,, our body breaks down this complex food material to simple food material like glucose,,,,, which is source of energy for body,,,,,,,, the process of breakdown of complex food material to simple food material is called as digestion

Answer 6

you should look this up but im pretty sure it has to do with oxygen burning energy from food that have and don't have water and our bodies being mostly water. peace!

Vin

Answer 7

carbohydrats when your body chemicly changes it it releases energy if you search it you will most likly find articles containing this info.

Answer 8

Do your own homework!