When you breathe you inhale oxygen and exhale carbon dioxide. When and where does the carbon come into play?

Question

Carbon Dioxide is a mix of 1 carbon and 2 oxygen. Where does the carbon come from?

Answer 1

One example would be aerobic respiration of the cells' mitochindria. Every cell needs energy and the energy is drawn from energy rich molecules such as glucose (sugar). This sugar name is also based on the chemical structure known as carbohydrate (that is where your carbon for CO2 comes from). By breaking carbon bonds in this glucose molecule energy is released and stored in molecules of ATP. During this process oxygen is aiding in the ATP production. As a by-product of this "energy harvesting" process molecules of CO2 are released and than carried into the lungs where is is exhaled and new oxygen is inhaled.

Answer 2

Inhale Oxygen Exhale Carbon Dioxide

Answer 3

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When you breathe you inhale oxygen and exhale carbon dioxide. When and where does the carbon come into play?
Carbon Dioxide is a mix of 1 carbon and 2 oxygen. Where does the carbon come from?

Answer 4

Aerobic respiration involves breaking down sugar to release energy. Once you've done that, you really don't want those unnecessary sugar fragments (Carbon and oxygen) floating around getting in the way, and you don't really want to use energy up rebuilding the sugars - why bother when you can get more just by eating. So, why not put together a relatively cheap and easy-to-get-rid-of-by-exhaling compound that both dissolves in water and exists as a gas - Carbon dioxide! It's the amazing, modern, wonder waste-product! Now available on the breath of animals everywhere!

Answer 5

If you want to get extremely picky, yes the carbon does come from the glucose (C6H12O6) that is broken down during aerobic respiration, but it is actually just part of a chain that flows through most organisms. Plants take in carbon dioxide from the air and, through photosynthesis, convert it to glucose, while releasing oxygen as a waste product. Then, we eat plants, or other organisms that eat plants to obtain that carbon-containing glucose. Aerobic respiration requires the oxygen that the plants released, glucose, and some carrier molecules, and we exhale carbon dioxide. The cycle begins again. In fact the chemical reactions for photsynthesis and aerobic respiration are exactly opposite. The oxygen molecules that you breathe have been cycled through plants in their quest to produce energy for themselves.

Answer 6

The carbon primarily comes from the metabolism of carbohydrates, lipids and proteins in your diet (or from your body if you fast long enough).

Answer 7

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Answer 8

http://www.breathing.com/articles/carbon-dioxide.htm

Answer 9

chemical reactions happen

Answer 10

Sugar, fat, e.g. your metabolism.