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Because it takes energy to break down complex carbs into a form the body can use to make ATP.
Eat something. Carbohydrates are the first to be used in the citric acid cycle.
The process in which autotrophs use light energy to make carbohydrates is called photosynthesis. Chemosynthesis is the process by which some organisms use chemical energy to produce carbohydrates.
photosynthesis
Carbohydrates will give you energy with which to do your exercise, but the muscle itself is made from protein.
Carbohydrates are digested to give us energy to make us able to do daily activities.
Chloroplast.
photosynthesis
Calvin Cycle
Carbohydrates take the form of sugars, oligosaccharides, starches and fibres and are one of the three major macro-nutrients which supply the body with energy (fat and protein being the others). There is now good evidence that at least 55% of our daily calories should come from carbohydrates. You need carbohydrates to make glucose. if you don't have carbohydrates you get hungry
Carbohydrates take the form of sugars, oligosaccharides, starches and fibres and are one of the three major macro-nutrients which supply the body with energy (fat and protein being the others). There is now good evidence that at least 55% of our daily calories should come from carbohydrates. You need carbohydrates to make glucose. if you don't have carbohydrates you get hungry
First, energy from the sun is used to combine CO2 and water to make carbohydrates. The carbohydrates have stored energy that is released when the carbohydrates are broken down. When animals eat the plant and break down the carbohydrates, they receive energy. In turn, carnivores that eat those animals receive energy from the fats and proteins in their prey.