1. How do we ‘get’ our energy?
Cellular Respiration
How do we ‘get’ our energy?

2. Photosynthesis Review
Photosynthesis is when PLANTS absorb SUNLIGHT, CO2 and H2O and turn it into C6H12O6 and O2

3. Photosynthesis Review
It happens in the CHLOROPLAST, with the help of the CHLOROPHYLL

4. Photosynthesis Review
The REACTANTS are CARBON DIOXIDE, WATER and SUNLIGHT.
These things come BEFORE the arrow
The PRODUCTS are GLUCOSE (SUGAR) and OXYGEN GAS
These things come AFTER the arrow

6. Cellular Respiration
Plants are PRODUCERS – because they can make their own food by photosynthesis.
We (humans) are CONSUMERS – we CANNOT make our own food through photosynthesis.
We must EAT food in order to get our energy!
Does FOOD = ENERGY? NO!!
Food = Food
ATP = Energy
We must turn our food into ATP by the process called CELLULAR RESPIRATION!!

7. Cellular Respiration It happens in the MITOCHONDRIA
It is the OPPOSITE of photosynthesis.

9. Cell Respiration is the OPPOSITE of Photosynthesis

10. Cellular Respiration
Cellular Respiration takes GLUCOSE and OXYGEN and turns it into ATP, CARBON DIOXIDE and WATER
The PRODUCTS of photosynthesis are the REACTANTS for cell respiration

12. ATP ATP stands for Adenosine Triphosphate
Gotta get that ATP - Biology Song – YouTube
ATP stands for Adenosine Triphosphate
The energy in ATP is stored in the BONDS between the phosphates
When the bond is broken, ENERGY is RELEASED

13. The REACTANTS of respiration are GLUCOSE and OXYGEN
The REACTANTS of respiration are GLUCOSE and OXYGEN. The sugar (glucose) is obtained from ingestion (EATING) of food. The oxygen is obtained from the AIR.
2. The PRODUCTS of respiration are ATP, WATER and CARBON DIOXIDE. The water and carbon dioxide are released into the environment as WASTE. ATP is kept in the cell for use as ENERGY.

14. Do plants need to do Cell Respiration?
YES!!! ALL living things must do cell respiration!
Photosynthesis provides no DIRECT source of energy for the cell. The plant cell must convert the sugar made during photosynthesis to another form of energy: ATP

15. Two Types
There are 2 types of cellular respiration… the kind we’ve been discussing is AEROBIC respiration because it requires OXYGEN!!

16. Cellular Respiration
Recall that Cellular Respiration REQUIRES OXYGEN as one of its reactants
But what happens when ATP is needed and there is NO OXYGEN available?
Do you DIE?!?

17. Anaerobic Respiration
Aerobic – “with oxygen” AIRobic
Anaerobic – “without oxygen”
Anaerobic respiration happens when there is no oxygen available.
Does NOT make much ATP but it does happen VERY FAST!!
It is NOT the method we want to use…but it will keep us alive
Two types of anaerobic respiration:
Alcoholic fermentation
Lactic Acid fermentation

18. Aerobic Respiration ATP ATP ATP ATP ATP ATP ATP ATP ATP ATP ATP ATP
AEROBIC Respiration uses oxygen and produces a LOT of ATP
36 ATP for every glucose molecule
ANAEROBIC Respiration does not use oxygen and only produces a LITTLE ATP
2 ATP for every glucose molecule
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP
ATP

19. Types of Anaerobic Respiration
There are 2 types of ANAEROBIC respiration
The type that is done depends on the type of organism doing the respiration
Alcoholic fermentation – yeasts and other microorganisms
Produces alcohol and CO2
Lactic Acid fermentation – animals, like humans
Produces lactic acid and CO2

20. Alcoholic fermentation
Done by yeast and other microorganisms
Produces alcohol and CO2 as waste products
Bread is made this way
Bread Making Video

21. Alcohol…Harmful or Not?!?
YOU decide!!

22. The yeast are using the sugar to make ATP through ANAEROBIC respiration
The balloon fills up with CO2, which is a waste product

23. The holes in Bread are caused by pockets of CO2, as a result of anaerobic respiration

24. Lactic Acid fermentation
■ Done by animals, like humans
■Produces lactic acid and CO2 as waste products
▫Lactic acid builds up in the muscles and causes pain
You’ve heard the saying… “Feel the Burn!!” The burn is caused by the acid building up in your muscles.
Ouch