Now let's use another analogy to understand what happens inside the mitochondria to provide that energy. Sometimes we can better understand how the mitochondria work if we think of a fire.

Have you ever watched a fire burn such as a fireplace, a wood stove, or a campfire?

What is needed for the fire to burn? On the fire drawing in your lab book write what you think is needed.

1. What is produced when the fire burns?

2. Does any energy come from a fire?

3. What form is the energy in?

Now let's use what you know about the fire to think about what might happen inside the mitochondria. As your teacher leads, map the features of the fire analogy to the mitochondrion.

If the wood is the fuel for the campfire, what do you think is the fuel for the mitochondria?

Is oxygen needed by the mitochondria?

What is left over when oxygen and glucose are used in the mitochondria for cellular respiration?

Draw these on the figure of the mitochondrion in your lab book.