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Cellular Respiration

Section 9-1

In the Mitochondria.

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Section Outline

Chemical PathwaysA. Chemical Energy and FoodB. Overview of Cellular

RespirationC. Glycolysis

1. ATP Production2. NADH Production

D. Fermentation1. Alcoholic Fermentation2. Lactic Acid Fermentation

Section 9-1

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Glucose

Glycolysis Krebs cycle

Electrontransport

Fermentation (without oxygen)

Alcohol or lactic acid

Chemical Pathways

Section 9-1

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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

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Glucose

To the electron transport chain

Figure 9–3 Glycolysis

Section 9-1

2 Pyruvic acid

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Glucose

To the electron transport chain

Figure 9–3 Glycolysis

Section 9-1

2 Pyruvic acid

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Glucose

To the electron transport chain

Figure 9–3 Glycolysis

Section 9-1

2 Pyruvic acid

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Glucose Pyruvic acidLactic acid

Figure 9–4 Lactic Acid Fermentation

Section 9-1

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Glucose Pyruvic acidLactic acid

Figure 9–4 Lactic Acid Fermentation

Section 9-1

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Glucose Pyruvic acidLactic acid

Figure 9–4 Lactic Acid Fermentation

Section 9-1

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Section Outline

The Krebs Cycle & Electron TransportA. The Krebs CycleB. Electron TransportC. The TotalsD. Energy and Exercise

1. Quick Energy2. Long-Term Energy

E. Comparing Photosynthesis and Cellular Respiration

Section 9-2

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Flowchart

Section 9-2

Glucose(C6H1206)

+Oxygen

(02)

GlycolysisKrebsCycle

ElectronTransport

Chain

Carbon Dioxide

(CO2)+

Water(H2O)

Cellular Respiration

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Citric Acid Production

Figure 9–6 The Krebs Cycle

Section 9-2

Mitochondrion

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Citric Acid Production

Figure 9–6 The Krebs Cycle

Section 9-2

Mitochondrion

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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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ATP Totals Theoretical Yield:

•4 ATP from substrate-level phosphorylation (net) •1 ATP per proton pumped across the inner mitochondrial membrane

•3 protons per NADH (10 NADH per glucose = 30 ATP) •2 protons per FADH2 (2 FADH2 per glucose = 4 ATP)

•Transport of the NADH formed in glycolysis across the mitochondrial membrane - 2 ATP (total) •Total = 4 + 30 + 4 - 2 = 36 mol ATP per glucose

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