Download Cellular Respiration

• The mitochondria are the engines of our
cells where sugar is burned for fuel and the
exhaust is CO2 and H2O.
What molecule do all organisms use to
temporarily store energy?
A
P
P
P
High Energy Bond
A
P
P
P
Adenosine
Triphosphate
Adenosine
Diphosphate
+ phosphate
ATP
ADP
ATP – ADP Energy Cycle in the Cell
Cellular Respiration breaks down
Glucose and releases
Energy
ATP Synthase
ADP
+
P
ATP
Nerve
impulses
Muscle
Contractions
Energy used for:
Hydrolysis
Cell Activities
Respiration
Dehydration
Synthesis
C6H12O6 + 6O2
(Muscles)
C6H12O6
Enzymes
Enzymes
6CO2 + 6H2O + 36ATP
2Lactic Acids + 2ATP
(Bacteria & Yeast)
Enzymes
C6H12O6
2Ethyl Alcohols + 2CO2 + 2ATP
Step 1
Glycolysis
Glycolysis
Step 2
Fermentation
Krebs Cycle
(Splitting of Glucose)
C6H12O6 + 2ATP
Enzymes
2Pyruvic Acids + 4ATP
Net Gain of ATP =
**Occurs in Cytoplasm**
**Anaerobic and Aerobic Respiration**
Glycolysis:
Oxygen not available
(Muscles)
Enzymes
2Pyruvic Acids
2Lactic Acids
(Bacteria & Yeast)
Enzymes
2Ethyl Alcohols + 2CO2
2Pyruvic Acids
Aerobic Respiration
**Oxygen is available**
Enzymes
2Pyruvic Acids+ 6O2
6CO2 + 6H2O + 32ATP
**Occurs in mitochondria**
Also called citric acid cycle
Glycolysis 2ATP
Step 1
Glycolysis
Step 2
Fermentation 0 ATP Kreb Cycle 34ATP
Total
2ATP
2ATP
36ATP
- Cheese
- Buttermilk
- Yogurt
- Alcoholic Beverages
- Bread
Oxygen Required
Occurs in Mitochondria
36 ATP/glucose
No Oxygen Required
Occurs in Cytoplasm
2 ATP/glucose
Linked Processes
Photosynthesis
Aerobic Respiration
• Energy-storing pathway
• Energy-releasing
pathway
• Releases oxygen
• Requires oxygen
• Requires carbon dioxide
• Releases carbon dioxide
Food: Ingestion
Food: Photosynthesis
Use CO2
Release O2 as waste
Energy: Respiration
Energy: Respiration
Use O2
Use O2
Release CO2 as waste Release CO2 as waste
Use ATP to maintain
homeostasis
Use ATP to maintain
homeostasis
Respiration vs. Photosynthesis