Find your seat and quietly get out your chapter
6 worksheet for grading
Think about photosynthesis so far. Write down
your muddiest point(s) (most confusing idea).
I will be able to:
•Identify the two main steps of cellular
respiration
•Compare lactic acid fermentation with alcoholic
fermentation
•Calculate the ATP produced by cellular
respiration
•Describe the difference between aerobic and
anaerobic respiration
Cellular respiration – process where cells obtain
energy from carbohydrates
Produces ATP
1. Glycolysis
2. Aerobic respiration if oxygen present
• Anaerobic respiration (fermentation) if no oxygen
present
• Glycolysis – process where 1 glucose breaks
down to form 2 pyruvic acids
• Occurs in cytosol
• What is cytosol?
2
• Spend 2 ATP to start glycolysis
• 4 ATP are produced at end of glycolysis
• How many ATP are gained?
•
•
•
•
Spend 2 ATP to start glycolysis
4 ATP are produced at end of glycolysis
How many ATP are gained?
2 ATP !!!!!!
• 2 ATP produced from glycolysis
• 2 ATP total
• Happens in the cytosol
• Energy obtained from glucose with NO OXYGEN
PRESENT
• 2 types of anaerobic respiration
• How would you feel afterwards if you had to
sprint ½ a mile?
1. Lactic acid fermentation
• Used to manufacture dairy products like cheese
and yogurt
• Muscles produce lactic acid when they are tired
and oxygen runs low
1. Lactic acid fermentation
• Body uses this for quick energy
• Lactic acid builds up in muscles causing
soreness and pain
https://www.youtube.com/watch?v=D_jldrz0gmk
2. Alcoholic fermentation
•
•
•
•
Done by some yeast when NO OXYGEN PRESENT
Produces alcohol and carbon dioxide
This is what causes bread to rise
https://www.youtube.com/watch?v=0z8hrRXQuHY
• https://www.youtube.com/watch?v=fRscYVvEFt
8
• OXYGEN IS PRESENT
• Occurs in mitochondria (powerhouse)
• Pyruvic acid broken down into carbon dioxide in
a series of steps
• This releases energy
• Review: where does pyruvic acid come from?
• Citric acid created here (sometimes called citric
acid cycle)
• 2 ATP produced
• 2 ATP produced from glycolysis
• 2 ATP produced from Krebs cycle
• 4 ATP total
•
•
•
•
Electrons from Krebs cycle start chain reaction
This forms ATP from ADP
Occurs in mitochondria
Water is also produced from hydrogen, oxygen,
and spare electrons
• 34 ATP produced
•
•
•
•
2 ATP produced from glycolysis
2 ATP produced from Krebs cycle
34 ATP produced from electron transport chain
38 total WOW!!!!!!!!!
• Cellular respiration produces long term energy
• This is good for long term exercise
• Look at the formula for cellular respiration
• Now look at the formula for photosynthesis
• What do you notice?