- ENERGY! HOW DO WE GET THEM...

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We need energy to maintain the many chemical and physical activities of the body, all energy comes from the sun. Plants use this solar energy to perform chemical reactions to form carbohydrates, fats and protein. Humans, like animals, consume plants and other animals to obtain the energy required to maintain cellular activities. These cellular activities known as metabolism are maintained under homeostatic controls. These many chemical reactions occurring in our bodies must be regulated to maintain a balance between the trillions of cells in our body.

Metabolism can be defined as all of the chemical processes that occur in the body.

The food you eat can either be burned to liberate energy, converted into bodyweight, or excreted.

The calories coming from protein are used for maintenance, repair, and growth of new tissues and organs.

Calories from carbohydrates are used for energy.

Calories from conventional sources of a fat are prone to be stored as fat since it already has the same molecular structure as body fat.

Energy metabolism is a series of chemical reactions that result in the breakdown of foodstuffs (carbohydrate, fat, protein) by which energy is produced, used, and given off as heat.
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