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cellular respiration

Where Do You Get Your Energy?
Image: iStockphoto.com/Smitt

Where Do You Get Your Energy?

Wouldn’t it be enough just to eat? Why do you have to breathe too? Right now in your cells, oxygen you inhaled is breaking down sugars you ate to produce adenosine triphosphate, or ATP, the molecule that powers your body.

What’s more, this biochemical energy process is amazingly similar to a fire. Have we sparked your curiosity?

Exploratorium
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CellCraft

CellCraft

Try your hand at building a single-celled organism by acquiring the necessary ingredients -- organelles, energy, and others -- in this game. More...

Game
Carolina Biological Supply
Slaves to Evolution

Slaves to Evolution

The mitochondria in our cells, which turn our food into stored energy, seem to have come from an ancient meal — during which one bacterium ate another. More...

Article
ABC
Workin’ It Out

Workin’ It Out

The SciGirls try out different activities — including soccer, walking, and dance — to find their favorite forms of exercise. More...

Video
SciGirls/PBS
Burn Baby Burn!

Burn Baby Burn!

Discover the similarity between a raging fire and your cells getting energy from food. In both cases, oxygen tears fuel molecules apart, producing carbon dioxide, water, and lots of energy. More...

Video
Australian Broadcasting Corporation
How Much Energy is Stored in Different Types of Food?

How Much Energy is Stored in Different Types of Food?

You'll never need to believe a label again, once you've built a device that measures the calories in food. Be careful to burn your food samples, though, and not yourself! More...

Activity
Science Buddies
Introduction to Respiration

Introduction to Respiration

Respiration involves a lot more than breathing. The word refers to a series of events that ends with cells using oxygen to get energy from food. Here's a rundown of respiration in cells. More...

Article
BBC
Marathon Mouse

Marathon Mouse

Could you get fit while lying on the couch? Endurance exercise improves your body’s ability to make ATP, and now a drug has achieved the same result in mice, which didn’t have to lift a whisker. More...

Video
NOVA/PBS
ATP and Respiration: Crash Course

ATP and Respiration: Crash Course

Cells can turn one molecule of sugar into 38 molecules of stored energy. Want to know how? Then hang on as this video makes the process as simple as possible, but no simpler. More...

Video
CrashCourse
Energy in a Cell: Quiz

Energy in a Cell: Quiz

How well do you understand biochemical energy? Prep for an upcoming test or just challenge yourself with this quiz. More...

Interactive
McGraw-Hill
Profiles: Biochemist

Profiles: Biochemist

Meet Roselle Rojas, a biochemist at Gatorade's Sport Science Institute where they study how the human body "fuels and cools" itself. What's it like to work with the sweat of famous athletes? More...

Profile
National Science Foundation
Renewable Energy: You’re Soaking in It

Renewable Energy: You’re Soaking in It

A "large part of the reason we eat, and the entire reason we breathe" is to get the energy we need by making and recycling ATP. More...

Article
Australian Broadcasting Corporation

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