Cellular

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.

QQ#1

Why do we breathe?

Discuss your thoughts

with the person next

to you and think about

why do we breath

MORE during

exercise.

QQ#2: When you inhale, what gas

are you taking from the air?

QQ#3

Where does this

oxygen come

from?

Give me a word

and an equation

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 cellular respiration.

Animals do cell respiration!

Plants do cell respiration!

Even bacteria do cell respiration!

QQ#4: Checking in, why do all

living things need to 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 H2O Oxygen+Glucose Carbon Dioxide + Water

QQ#5: Why does this look familiar?

The aerobic cell respiration

equation is the opposite of

photosynthesis!

What are some organisms that do

aerobic cell respiration?

• Animals (including

humans)

• Plants

• QQ#6: where does

each group get the

glucose necessary for

cell respiration

Aerobic cell respiration requires

oxygen

Aerobic Respiration:

-goes through three steps to break

down glucose and make energy

-makes a net of 36 ATP molecules

Steps of Aerobic Respiration:

-glycolysis: makes 2 ATP

-Kreb’s cycle AND electron

transport chain: makes 34 ATP

Remember,

Cells use ATP for

energy

Where in the cell

does aerobic cell

respiration occur?

Glycolysis: in

cytoplasm

Kreb’s cycle/ETC: in

MITOCHONDRIA!

There is another type of cell

respiration

Some organisms

such as yeast and

bacteria do anaerobic

cell respiration.

QQ#7:

predict: What does anaerobic

mean?

Anaerobic means:

without oxygen

This results in either:

Alcoholic fermentation

or lactic acid

fermentation

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.

Alcoholic Fermentation Equation:

C6H12O6 2CO2 (gas) + 2C2H6O+ ENERGY

Glucose Carbon Dioxide + Ethyl Alcohol + Energy

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

QQ7: Summarize Aerobic Respiration

• Aerobic requires oxygen

• The products of aerobic are carbon

dioxide and water

• Aerobic yields 36 ATP

• Aerobic happens in the mitochondria of

eukaryote cells

QQ#8: Summarize anaerobic respiration

• Anaerobic does not require oxygen

• The products of anaerobic are carbon

dioxide and alcohol or lactic acid

• Anaerobic yields 2 ATP