Interest Grabber
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Transcript of Interest Grabber
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Interest Grabber
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.
Section 9-1
1. How does your body feel at the start of exercise, such as a long, slowrun? 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 changesin how you feel?
3. Think about running as fast as you can for 100 meters. Could youkeep up this pace for a much longer distance? Explain your answer.
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OVERALL EQUATION
C6H12O6 + 6O2 6CO2 + 6H2O + energy(ATP)
Glucose + Oxygen Carbon Dioxide + Water + ATP (Adenosine triphosphate)
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Section Outline
9–1 Chemical PathwaysA. 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
Section 9-1
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Section Outline
9–2 The Krebs Cycle and Electron TransportA. The Krebs Cycle
B. Electron Transport
C. The Totals
D. Energy and Exercise
1. Quick Energy
2. Long-Term Energy
E. Comparing Photosynthesis and Cellular Respiration
Section 9-2
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ORGANELLE OF FOCUS
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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
Glycolysis Krebs cycle
Electrontransport
Fermentation (without oxygen)
Alcohol or lactic acid
Chemical Pathways
Section 9-1
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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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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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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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CHECK FOR UNDERSTANDING
BEFORE WE GO ANY FURTHER – SEE HOW WELL YOU UNDERSTAND THE FIRST TWO STEPS IN CELLULAR RESPIRATION:
Answer the questions in your notes, use your textbook Ch9.
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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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Summary Chart
Input Step Outputs ATPs
Total ATPS________
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SUMMARY
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WHAT IF THERE ISN’T ANY OXYGEN?
CELLUAR RESPIRATION: Anaerobic (fermentation)
*yeast cells = alcohol production
*muscle cells = lactic acid production
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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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Pros and Cons of Lactic Acid Fermentation
Pros – your muscle will keep working even without sufficient oxygen
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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
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RECAP6C6H12O6 + 6O2 6CO2 + 6H2O + energy (ATP)
GLUCOSE becomes…• CO2
Oxygen is needed…• to accept the electrons at the end of ETC
CO2 goes…• into blood, lungs, exhaled
Water is produced when…• O2 collects enough e- and H+ to become water
ATP is produced…• in glycolysis, Kreb Cycle and mainly in ETC due to chemiosmosis
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Pyruvic acid is made …• at the end of glycolysis (3C)
NADH and FADH2 carry …• Electrons and H+ to the ETC
Protons (H+) build up in the …due to…• Intermembrane space, ETC pushing them out
ATP synthase allows H+ to … and …• Back into the matrix, produces ATPs
If no oxygen, yeast produce…• ethanol
If no oxygen, muscle cells produce…• Lactic acid
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The ETC produces...
• 34 ATPs
In aerobic respiration, Pyruvic acid is converted to…
• Acetyl CoA
The molecule that must be recycled in the Kreb cycle is…
• Oxaloacetic acid
The break down of one glucose gives…
• 38 total ATP
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Autotrophs…
• Make their own food/chemical energy
Heterotrophs…
• Must eat other things to obtain chemical energy
Aerobic respiration requires…
• Oxygen
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VIDEO LINKS
•FROM FOOD TO ATP
•Cellular Respiration Overview
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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
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Click the image to play the video segment.
Video 1
Aerobic Respiration
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Video 2
Glycolysis
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Video 3
Krebs Cycle, Part 1
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Video 4
Krebs Cycle, Part 2
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Video 5
Electron Transport Chain, Part 1
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Video 6
Electron Transport Chain, Part 2
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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.
Go Online
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