Interest Grabber
Section 9-1
Feel the Burn
Do you like to run, bike, or swim? These all are good ways to exercise.
When you exercise, your body uses oxygen to get energy from glucose,
a six-carbon sugar.
1. How does your body feel at the start of exercise, such as a long, slow
run? How do you feel 1 minute into the run; 10 minutes into the run?
2. What do you think is happening in your cells to cause the changes
in how you feel?
3. Think about running as fast as you can for 100 meters. Could you
keep up this pace for a much longer distance? Explain your answer.
Go to
Section:
Section Outline
Section 9-1
9–1
Chemical Pathways
A. Chemical Energy and Food
B. Overview of Cellular Respiration
C. Glycolysis
1. ATP Production
2. NADH Production
D. Fermentation
1. Alcoholic Fermentation
2. Lactic Acid Fermentation
Go to
Section:
Section Outline
Section 9-2
9–2
The Krebs Cycle and Electron Transport
A.
B.
C.
D.
The Krebs Cycle
Electron Transport
The Totals
Energy and Exercise
1. Quick Energy
2. Long-Term Energy
E. Comparing Photosynthesis and Cellular Respiration
Go to
Section:
Figure 9–2 Cellular Respiration: An Overview
Section 9-1
Mitochondrion
Electrons carried in NADH
Pyruvic
acid
Glucose
Glycolysis
Krebs
Cycle
Electrons
carried in
NADH and
FADH2
Electron
Transport
Chain
Mitochondrion
Cytoplasm
Go to
Section:
Chemical Pathways
Section 9-1
Glucose
Glycolysis
Krebs
cycle
Fermentation
(without oxygen)
Go to
Section:
Electron
transport
Alcohol or
lactic acid
Flowchart
Section 9-2
Cellular Respiration
Glucose
(C6H1206)
+
Oxygen
(02)
Go to
Section:
Glycolysis
Krebs
Cycle
Electron
Transport
Chain
Carbon
Dioxide
(CO2)
+
Water
(H2O)
Figure 9–3 Glycolysis
Section 9-1
Glucose
2 Pyruvic acid
To the electron
transport chain
Go to
Section:
Figure 9–3 Glycolysis
Section 9-1
Glucose
2 Pyruvic acid
To the electron
transport chain
Go to
Section:
Figure 9–3 Glycolysis
Section 9-1
Glucose
2 Pyruvic acid
To the electron
transport chain
Go to
Section:
Figure 9–6 The Krebs Cycle
Section 9-2
Citric Acid
Production
Mitochondrion
Go to
Section:
Figure 9–6 The Krebs Cycle
Section 9-2
Citric Acid
Production
Mitochondrion
Go to
Section:
Figure 9–7 Electron Transport Chain
Section 9-2
Electron Transport
Hydrogen Ion Movement
Channel
Mitochondrion
Intermembrane
Space
ATP synthase
Inner
Membrane
Matrix
ATP Production
Go to
Section:
WHAT IF THERE ISN’T ANY OXYGEN?
CELLUAR RESPIRATION: Anaerobic (fermentation)
*yeast cells = alcohol production
*muscle cells = lactic acid production
Go to
Section:
Figure 9–4 Lactic Acid Fermentation
Section 9-1
Glucose
Go to
Section:
Pyruvic acid
Lactic acid
Figure 9–4 Lactic Acid Fermentation
Section 9-1
Glucose
Go to
Section:
Pyruvic acid
Lactic acid
Figure 9–4 Lactic Acid Fermentation
Section 9-1
Glucose
Go to
Section:
Pyruvic acid
Lactic acid
Pros and Cons of Lactic Acid
Fermentation
Pros – your muscle will keep working even without sufficient oxygen
Go to
Section:
Cons – you feel it, lactic acid causes sore muscles and cramping
Your body will get rid of lactic acid – it diffuses into blood and goes to liver
where it is converted back to pyruvic acid – ready for O2
LIVER
Go to
Section:
VIDEO LINKS
•FROM FOOD TO ATP
•Cellular Respiration Overview
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Section:
Video Contents
Click a hyperlink to choose a video.
Aerobic Respiration
Glycolysis
Krebs Cycle, Part 1
Krebs Cycle, Part 2
Electron Transport Chain, Part 1
Electron Transport Chain, Part 2
Video 1
Aerobic Respiration
Click the image to play the video segment.
Video 2
Glycolysis
Click the image to play the video segment.
Video 3
Krebs Cycle, Part 1
Click the image to play the video segment.
Video 4
Krebs Cycle, Part 2
Click the image to play the video segment.
Video 5
Electron Transport Chain, Part 1
Click the image to play the video segment.
Video 6
Electron Transport Chain, Part 2
Click the image to play the video segment.
Go Online
Links from the authors on Creatine
Share kimchi lab data
Interactive test
For links on cellular respiration, go to www.SciLinks.org and enter the
Web Code as follows: cbn-3091.
For links on the Krebs cycle, go to www.SciLinks.org and enter the
Web Code as follows: cbn-3092.
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