Cell Respiration

Cell Respiration is a process your cells do to make energy. You need to breathe in

order for your cells to do the process of cell respiration and make energy.

When you inhale, what gas are you taking from the air?

Have you ever wondered where that oxygen goes?

From your lungs, it diffuses into your blood.

Its ultimate destination: your cells

When the oxygen-rich blood reaches your cells, oxygen diffuses across

the cell membrane and into the cells.

Your cells will use the oxygen

to do cell respiration and

make ATP energy.

Carbon Dioxide is a waste product of cellular respiration.

So, it diffuses out of your cells and into your bloodstream.

Once it arrives at your lungs, it

diffuses out of the blood and

into your lungs.

Then, you exhale it.

So, the reason you breathe is

in order for your cells to

do cell respiration.

Are you the only thing that does cell respiration?

NO!

All living things do cell respiration.

Animals do cell respiration!

Plants do cell respiration!

Even bacteria do cell respiration!

So, what is cell respiration?

The chemical equation for aerobic cell respiration may look familiar to you.

6 O2 + C6H12O6 6 CO2 + 6 H2OOxygen+Glucose Carbon Dioxide + Water

The aerobic cell respiration equation is the opposite of

photosynthesis!

What are some organisms that do aerobic cell respiration?

• Animals (including humans)

• Plants

Aerobic cell respiration requires oxygen

In the process of breaking down glucose, aerobic cell respiration

makes a net of 36 ATP molecules.

Remember,

Cells use ATP for

energy

Where in the cell does aerobic cell respiration occur?

IN THE MITOCHONDRIA!

Is there another type of cell respiration?

YES!

Some organisms such as yeast and bacteria do anaerobic cell respiration.

What does anaerobic mean?

Without oxygen

Products of anaerobic respiration include:

• The carbon dioxide produced is used to make bread rise

•The ethyl alcohol produced is used in wine and beer.

And, if you’ve ever worked out too hard and your muscles ache..

Lactic Acid Fermentation is when your muscle cells produce lactic acid through anaerobic cell respiration

Anaerobic cell respiration is less efficient

It only produces a net of 2 ATP molecules

Let’s Review

There are two types of cell respiration

• Aerobic• Anaerobic

• Aerobic requires oxygen

• The products of aerobic are carbon dioxide and water

• Aerobic yields 36 ATP

• Aerobic happens in the mitochondria of eukaryote cells

• Anaerobic does not require oxygen

• The products of anaerobic are carbon dioxide and alcohol or lactic acid

• Anaerobic yields 2 ATP

Check for understanding:

How are photosynthesis and respiration dependent upon each other?