1. What is the name of the molecule that living things use for energy?
Bellringer
What is the name of the molecule that living things use for energy?

2. UNIT 2 PART 3: CELLULAR RESPIRATION
Energy is the ability to do work.
All living things need energy, and they get it from food. Carbs are the main source.
Some energy is released as heat to maintain body temp.
The rest is stored in chemical form.
The reaction takes place in many small steps so energy is not lost.

3. Energy for Cell Work E ATP E Energy from food
This energy releasing process is called CELLULAR RESPIRATION.
As the chemical bonds in food are broken, energy is released.
The energy released is used to change ADP into ATP.
Energy for Cell Work E
ADP + P
ATP E
Energy from food

4. ATP – the energy molecule~ ~
High energy bonds where energy is stored
ADP has only 2 phosphate groups. During cellular respiration the energy released by the breakdown of food is used to attach another P group to ADP making it ATP.

5. When the last P is removed from ATP, the energy is transferred to another molecule to do work like cell growth, repair, or transport.

6. Cellular respiration uses the simplest form of carbs obtained from digestion - glucose
One molecule of glucose (C6H12O6,), an organic molecule, can make 38 ATP molecules (energy storage in the cell)
Cellular respiration can be written as:
C6H12O O2  6CO H2O + ENERGY
(ATP)

7. There are two types of respiration
Anaerobic
Does not use oxygen
Food is not broken down completely
Little energy is released (4 ATPs)
Alcohol or lactic acid are wastes (Fermentation)
Occurs in cytoplasm
Aerobic
Uses oxygen
Food is broken down completely
A lot of energy is released (38 ATPs)
Carbon dioxide and water are wastes
Occurs in mitochondria

8. OVERVIEW OF CELLULAR RESPIRATION
ANAEROBIC RESPIRATION
Alcoholic fermentation (yeast)
2 ethyl alcohol + 2 CO2
cytoplasm
Net total: 2 ATP
2 ATPs
4 ATPs
Lactic acid fermentation (bacteria)
2 Lactic acid
2 pyruvic acid
glucose
glycolysis
Acetyl CoA
mitochondrion
6 CO2 +
6 H2O +
34 ATP
AEROBIC RESPIRATION
Electron
Krebs cycle
Transport
Net total: 36 ATP
Chain
C6H12O O2  6CO H2O ATP

9. MUSCLE FATIGUE Muscle cells use aerobic respiration.
During prolonged periods of exercise muscles sometimes don’t get enough oxygen so they use anaerobic respiration.
This produces lactic acid which can build up in the muscles making them sore.
Need to rest to recover.

10. Anaerobic Respiration Aerobic Respiration in cytoplasm in mitochondria
2 ATP
2 ____ E
Word Bank: Pyruvic acid, H2O, CO2, CO2, Lactic Acid, Alcohol, ATP, ATP, ADP, Glucose, O2
1 _______
4 ADP
4 ____
34 ADP ____ E E
6 ________ &
6 ________
2 ______
_____
Yeast
Bacteria
2 ________ &
2 __________
2 _______
_______