Respiration
Cellular respiration is the process that releases energy by breaking down glucose and other food molecules in the presence of oxygen.
Oxygen+ glucose->carbon dioxide+ water
GlucoseGlycolysis
Cytoplasm
Pyruvic acid
Electrons carried in NADH
Krebs Cycle
Electrons carried in
NADH and FADH2 Electron
Transport Chain
Mitochondrion
Figure 9–2 Cellular Respiration: An Overview
Mitochondrion
Section 9-1
Glycolysis takes place in cytoplasm
Glycolysis is the process in which one molecule of glucose is broken in half, producing two molecules of pyruvic acid.
Two ATP molecules are needed as activation energy to produce 4 ATP molecules and 2 NADH molecules
Glucose
To the electron transport chain
Figure 9–3 Glycolysis
Section 9-1
2 Pyruvic acid
Glucose
To the electron transport chain
Figure 9–3 Glycolysis
Section 9-1
2 Pyruvic acid
Glucose
Glycolysis Krebs cycle
Electrontransport
Fermentation (without oxygen)
Alcohol or lactic acid
Chemical Pathways
Section 9-1
Glucose
To the electron transport chain
Figure 9–3 Glycolysis
Section 9-1
2 Pyruvic acid
Glucose Pyruvic acidLactic acid
Figure 9–4 Lactic Acid Fermentation
Section 9-1
Fermentation
When oxygen is not present, fermentation occurs. Fermentation releases energy from food by producing ATP with out oxygen.
There are two types of fermentation Alcoholic and Lactic Acid
Glucose Pyruvic acidLactic acid
Figure 9–4 Lactic Acid Fermentation
Section 9-1
Glucose Pyruvic acidLactic acid
Figure 9–4 Lactic Acid Fermentation
Section 9-1
FlowchartSection 9-2
Glucose(C6H1206)
+Oxygen
(02)
GlycolysisKrebsCycle
ElectronTransport
Chain
Carbon Dioxide
(CO2)+
Water(H2O)
Cellular Respiration
Krebs Cycle
Krebs cycle occurs in the mitochondria and in the presence of oxygen pyruvic acid ( from glycolysis) is broken down into carbon dioxide.
Through a series of chemical reactions citric acid is formed and enters the krebs cycle (citric acid) to producing oxygen, ATP and NADH
Citric Acid Production
Figure 9–6 The Krebs Cycle
Section 9-2
Mitochondrion
Citric Acid Production
Figure 9–6 The Krebs Cycle
Section 9-2
Mitochondrion
Electron Transport Chain
Figure 9–7 Electron Transport Chain
Section 9-2
Electron TransportHydrogen Ion Movement
ATP Production
ATP synthase
Channel
Inner Membrane
Matrix
Intermembrane Space
Mitochondrion
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