cell energy: cellular respiration
DESCRIPTION
Cell Energy: Cellular Respiration. Cellular Respiration. Definition: The process where stored energy is converted to a usable form. Oxygen and glucose are converted to carbon dioxide, water, and ATP. Cellular Respiration Equation. (Opposite of photosynthesis) - PowerPoint PPT PresentationTRANSCRIPT
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Cell Energy: Cellular Respiration
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Cellular Respiration
Definition: The process where stored energy is converted to a usable form.
Oxygen and glucose are converted to carbon dioxide, water, and ATP.
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Cellular Respiration Equation
(Opposite of photosynthesis)
O2 + C6H12O6 CO2 + H2O + ATP(oxygen) + (glucose) (carbon dioxide) + (water) + (energy)
Reactants Products
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Who performs cellular respiration?
All organisms!!!
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Why is cellular respiration important?
Cellular respiration is the process organisms use to obtain energy from the food they eat.
Cells use the energy from cellular respiration for growth, repair, and maintenance.
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Processes involved
Glycolysis Aerobic Respiration
Kreb’s Cycle/Citric Acid Cycle Electron Transport Chain (ETC)
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Glycolysis (“Glucose-Breaking”)
Takes place in the cytoplasmThe glucose molecule is
broken into two pieces.Glucose is converted to
pyruvic acid: this conversion produces 2 ATP molecules.
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Aerobic Respiration “Aerobic” means “with oxygen” Oxygen is required for these
processes to occur: it is the final acceptor of electrons
34 ATP are produced Krebs cycle (Citric Acid) & the
electron transport chain (ETC)
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MitochondrionThe “Powerhouse of the Cell”
Aerobic respiration takes place in the mitochondrion.
This is where most of the ATP is produced.
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Cellular respiration is like a mirror image of photosynthesis.
The Krebs cycle transfers energy to an electron transport chain. takes place in
mitochondrial matrix breaks down three-carbon
molecules from glycolysis
– makes a small amount of ATP– releases carbon dioxide– transfers energy-carrying
molecules
6H O2
6CO2 2
6O 2
mitochondrion
matrix (area enclosedby inner membrane)
inner membrane
ATP
ATP
energy
energy from glycolysis
1
2
4
3
Krebs Cycle
Pyruvic Acid
ETC
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6H O2
6CO2 2
6O 2
mitochondrion
matrix (area enclosedby inner membrane)
inner membrane
ATP
ATP
energy
energy from glycolysis
1
2
4
3
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The Krebs Cycle/Citric Acid Cycle
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6H O2
6CO 2
6O 2
mitochondrion
matrix (area enclosedby inner membrane)
inner membrane
ATP
ATP
energy
energy from glycolysis
1
2
4
3
and
• The electron transport chain produces a large amount of ATP.– takes place in inner
membrane– energy transferred to
electron transport chain– oxygen enters process– ATP produced– water released as a
waste product
Electron Transport
ETC
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Electron Transport Chain
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Cellular Respiration: Pathways
Glycolysis
Anaerobic Respiration(fermentation)
Aerobic Respiration
Glucose
With oxygenWithout oxygen
2 ATP
No additional ATP34 ATP
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Cellular Respiration
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Anaerobic Respiration
Lactic Acid Fermentation Alcoholic Fermentation