1. Cell Respiration: Why We Need To Breathe…

2. What is Cellular Respiration?
The process of converting food energy into ATP
Aerobic process.
Uses glucose and oxygen, produces CO2 & water
C6H12O6 + 6 O2 → 6 CO2 + 6 H2O
Opposite photosynthesis

3. What is ATP? Adenosine triphosphate Energy’s version of cash Used for:
Growth and reproduction
Transport (active transport, endocytosis, exocytosis)
Mechanical work (muscle contraction, movement of cell structures, etc.)
Fun fact: 38% of the energy from glucose yields ATP, 62% is released as heat.

4. Molecules Used to Make ATP

5. Cellular Respiration Overview
Begins with pyruvate (from glycolysis)
If oxygen is available, cellular respiration will occur.
Krebs Cycle
Electron Transport (a.k.a
oxidative phosphorylation)

6. Kreb’s Cycle (Citric Acid Cycle)
Occurs in the matrix (fluid) of the mitochondria

7. Steps of Krebs/Citric Acid Cycle
Pyruvate is converted to Acetyl Coenzyme A
Acetyl-Co A is converted to Citric Acid
Produces:
6 NADH
2 FADH2
2 ATP
6 molecules of CO2 (waste)

8. Electron Transport Chain
Occurs in inner membrane (cristae) of the mitochondria
Uses oxygen, NADH and FADH2
Water and ATP are produced

9. ETC Process H+ ions are removed from NADH & FADH2
H + ions build up inside the membrane. As H+ flow out through the membrane, ATP is produced.
Makes ATP
Oxygen combines with H+ ions to form water (released as waste)

10. Summary of Cell Respiration
Process
Reactants (used)
Products (made)
Glycolysis
C6H12O6
Pyruvate
2 ATP
2 NADH
Kreb’s Cycle O2
6 NADH
2 FADH2
CO2
Electron Transport
8 NADH
32-34 ATP
H2O

11. Bozeman Science: https://www.youtube.com/watch?v=Gh2P5CmCC0M
Video Tutorial
Bozeman Science:
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