KEY CONCEPT The overall process of cellular respiration converts sugar into ATP using oxygen.

1
KEY CONCEPT The overall process of cellular
respiration converts sugar into ATP using oxygen.
2

• Glycolysis must take place first. It happens in
  the cells cytoplasm

• anaerobic process (does not require oxygen)
• splits glucose (from photosynthesis) into two
  three-carbon molecules called pyruvates
• produces two ATP molecules

2 pyruvate
Sweet Split
ATP
3

• Cellular respiration releases chemical energy
  from sugars (produced by photosynthesis) and
  other carbon-based molecules to make ATP when
  oxygen is present

• Cellular respiration is aerobic, or requires
  oxygen.

O2
4

• Cellular respiration takes place in mitochondria
  the powerhouse of the cell

5

• The Krebs cycle takes place inthe mitochondrial
  matrix
• 2 pyruvates (3 carbon molecules) enter cellular
  respiration

Krebs Cycle

• Pyruvates are broken down and ATP is made during
  the Krebs Cycle
• ATP (energy) is transfers energy-carrying
  molecules to the electron transport chain
• releases carbon dioxide

6

• The electron transport chain produces a large
  amount of ATP and takes place in the inner
  membrane

• 3. energy transferred to electron transport chain
• oxygen enters process and is used to make H2O
• 4. A large number of ATP molecules are produced

• water and heat are released

7
Cellular Respiration
..Reactants..



..Products..
8
Cellular Respiration
Sugars (2 pyruvates)
O2
..Reactants..



Energy is transferred to the E.T. C.
Energy transferred into inner membrane of mito
The Krebs Cycle breaks down pyruvates into ATP
A large of ATP is made. O2 is used to make H2O
Stage 2
Stage 1
CO2
H2O
Heat
..Products..
9

• Try and hold your breath for as long as you can
  (no cheating).

How did you feel as you were holding your
breath? Why do you think you felt this way? If
you were to run a few miles, what would happen to
your breathing?
10

• How does your body use oxygen?
• Oxygen helps your body break down chemical energy
  that is stored in sugars and other carbon based
  molecules.
• The energy produced is ATP

ATP
11

• Cellular respiration is like a mirror image of
  photosynthesis.

12
Cellular Respiration
Photosynthesis
13
Reactants Light Energy CO2 H2O
Reactants Sugars O2
Cellular Respiration
Photosynthesis
Products Glucose (sugar) O2
Products Glucose (sugar) O2
14

• The equation for the overall process is
• C6H12O6 6O2 ?????? 6CO2 6H2O

• The reactants in photosynthesis are the same as
  the products of cellular respiration.

15

• Plants use photosynthesis to make their own food
• Animals eats other organisms as food
• Food is not the direct source of energy
• Instead we break down molecules from food to
  produce ATP

• Cellular respiration releases chemical energy
  from sugars (produced by photosynthesis) and
  other carbon-based molecules to make ATP when
  oxygen is present

16
(No Transcript)
17
(No Transcript)
18

• Please make a diagram showing the relationship
  between Photosynthesis and Cellular Respiration
• chloroplast
• Mitochondria
• An animal
• a plant
• all products
• label photosynthesis and cellular respiration
• Show the arrows of the cycle

Sunlight
Photosynthesis
CO2
Sugar
O2
H2O
Cellular Respiration
ATP
19
Points to Ponder

• What is the difference between aerobic and
  anaerobic processes?
• In what organelle does cellular respiration take
  place?
• How does our body use oxygen?

20

• What is the difference between aerobic and
  anaerobic processes?
• Aerobic needs oxygen
• Anaerobic does not need oxygen
• In what organelle does cellular respiration take
  place?
• mitochondria
• How does our body use oxygen?
• Oxygen helps your body break down chemical energy
  that is stored in sugars and other carbon based
  molecules.