OBJECTIVE: EXPLAIN WHAT
HAPPENS TO THE FOOD WE EAT.
• Copy the KWL Chart Below onto your warm-up
sheet for the week. Date your warm-up 11/3/15
• Complete the “K and W” portions of the KWL Chart
First. We will finish the “L” portion after the video.
K (What I
W (What I want L (What I
already Know)
to know)
learned)
-At least two
-At least one
-At least two
things
thing
things
OBJECTIVE: EXPLAIN WHAT
HAPPENS TO THE FOOD WE EAT.
We will watch the Magic School Bus Video “ For
Lunch”. As we watch the video consider the
objective above. What happens to the food we eat?
-After the video you should be able to describe this
process in detail.
How do our bodies take food and make
it into energy?
WHAT IS CELLULAR
RESPIRATION
• Cellular respiration is a chemical process in which
glucose molecules are broken down to release
energy (ATP) for cellular functions
ATP
The food made
in
photosynthesis
is used to make
energy for cells!
Organisms
(including
plants) must
use this food
to produce
energy
Plants make
food for all
living
organisms
(sugar)
Food is NOT energy!
They are 2 different
things!
Adenosine
Energy is stored in a
chemical bond –
when the bond is
broken, energy is
released!
P
P
Energy
P
ATP is
the
energy
molecule
for cells
What types of organisms undergo cellular
respiration?
Cellular respiration occurs in ALL living cells!
WHAT TYPES OF ORGANISMS
UNDERGO CELLULAR
RESPIRATION?
• BOTH autotrophs and heterotrophs
What happens to the food we eat?
1. We break our food down into small
molecules
2. We use the energy
stored in the bonds in
our food to make ATP
3. A small amount of the food
becomes waste
What are some of the things that our body does that
requires energy?
Physical Activities
•Running
•Playing sports
•Pumping our hearts
Cellular Activities
•Sending messages to our brain
•Transporting molecules in and
out of our cells
WHY DOES CELLULAR
RESPIRATION TAKE PLACE?
• To convert sugars to ATP (form of energy in which it is most easily
broken down)
WHEN DOES CELLULAR
RESPIRATION TAKE PLACE?
• 24 hours a day
WHAT IS THE EQUATION FOR
CELLULAR RESPIRATION?
C6H12O6 + O2 → CO2 + H20 + ATP
(Sugar + Oxygen  Carbon Dioxide + Water+ATP)
WHAT ARE THE REACTANTS FOR
CELLULAR RESPIRATION?
• Sugars and oxygen
• It’s the SAME as the PRODUCTS of Photosynthesis!
WHAT ARE THE PRODUCTS FOR
CELLULAR RESPIRATION?
• Carbon dioxide, water and ATP
• It’s the SAME as the REACTANTS of Photosynthesis (if you switch
ATP for SUN)
Cellular respiration can be divided into 2
main parts.
1.Anaerobic respiration
2.Aerobic respiration
Anaerobic Respiration
Does NOT need
oxygen!
Happens in the
cytoplasm of a cell
Aerobic Respiration
Requires oxygen
Happens in the
mitochondria of a cell
Cellular Respiration
Cellular
respiration
can take
place
WITH
Aerobic
respiration
occurs when
oxygen is
present
Anaerobic
respiration
(fermentation)
takes place when
oxygen is NOT
present
Or
WITHOUT
Oxygen!
Makes
a LOT
of ATP
Makes
a little
ATP
WHAT IS THE EFFICIENCY OF
ATP FORMATION?
• For each glucose molecule:
– AEROBOIC: 36 ATPs
• WITH OXYGEN
– ANAEROBIC: 2 ATPs
• WITHOUT OXYGEN
(We are going to talk more about Aerobic vs. Anaerobic tomorrow!)
2 types of Anaerobic Respiration
1.Lactic Acid Fermentation
2.Alcoholic Fermentation
Lactic Acid Fermentation
Occurs in ANIMAL cells when oxygen is ABSENT
Occurs during rapid
periods of exercise
when the body
cannot supply
enough oxygen to
the tissues/muscles
Why do our muscles burn after we workout?
Lactic acid fermentation taking place in
our muscles!
Alcoholic Fermentation
Occurs is PLANT cells and YEAST in the
ABSENCE of oxygen
How does yeast make bread rise?
One of the products of alcoholic fermentation is carbon dioxide.
The carbon dioxide makes the little air pockets in bread and makes it
rise.
Anaerobic Respiration
O2 + C6H12O6  CO2 + H2O + Energy (ATP)
Even though anaerobic respiration is completed in a
different way, the products are the same as in aerobic
respiration!!!!!
TOTAL PRODUCTS:
-CO2
-H2O
-ATP
WHAT ARE THE FACTORS THAT
AFFECT THE RATE OF CELLULAR
RESPIRATION?
• Oxygen concentration
SUMMARY
Aerobic
Oxygen
Anaerobic
No oxygen
Makes 36
ATP
Makes 0
ATP
Lactic Acid Fermentation:
 occurs during rapid exercise when the
body cannot supply enough oxygen to the
tissue/muscles.
Produces: soreness/pain in muscles/ CO2
Makes: yogurt, cheese, pickles
Alcoholic Fermentation:
Occurs in yeast and other microorganisms, it produces alcohol and carbon
dioxide.
Produces: Alcohol and CO2
Makes: Beer, Wine, Bread
HOMEWORK
Complete the Checkpoint
Questions on the back of your
notes for homework. This is due
tomorrow when you come into
class.
PHOTOSYNTHESIS VS.
CELLULAR RESPIRATION
FOLDABLE
Now for the OTHER SIDE…
Photosynthesis
Respiration
WHERE
WHERE
INGREDIENTS
INGREDIENTS
EQUATION
EQUATION
What is Photosynthesis?
What is Cellular Respiration?
The process by which plants
make food.This process takes
place in the CHLOROPLAST
(mostly found in the leaves).
The process by which both
PLANTS and ANIMALS release
energy from food.This process
takes place in the cells
MITOCHONDRIA.
AUTOTROPHS only!
Autotrophs AND Heterotrophs
Where does photosynthesis take
place?
Where does respiration take place?
When does respiration take place?
When does photosynthesis take place?
(PICTURE)
(PICTURE)
Where does the energy come from?
Where does the energy come from?
Picture
Picture
REACTANTS:
REACTANTS:
PRODUCTS:
PRODUCTS:
EQUATION:
EQUATION:
REACTANTS
PRODUcTS
REACTANTS
PRODUcTS
CHECK POINT 1
1. Who does Cellular Respiration?
2. What is Cellular Respiration?
3. Which organelle does it happen in?
4. What does the organelle look like?
5. When does Cellular Respiration happen?
CHECK POINT 2
1. Why does Cellular Respiration take place?
2. What are the REACTANTS for Cellular Respiration (what goes IN)?
3. What are the PRODUCTS of Cellular Respiration (what comes
OUT)?
4. What is the EQUATION for Cellular Respiration ?
CHECK POINT 3
1.
What is a factor that affect the rate of photosynthesis?
2.
What are two types of Cellular Respiration?
3.
What is AEROBIC Respiration?
4.
How much ATP is made from 1 glucose molecule?
5.
What is ANAEROBIC Respiration?
6.
How much ATP is made form 1 Glucose molecule?