chapter 9. cellular respiration the process that releases energy (atp) by breaking down food...
TRANSCRIPT
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Chapter 9
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Cellular Respiration The process that releases
energy (ATP) by breaking down food molecules in the presence of oxygen
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Mitochondria Found?
Plant & Animal Cells Where respiration
takes placeJust aerobic parts
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Aerobic Vs. Anaerobic Respiration Aerobic = presence of O2
Respiration
Anaerobic = absence of O2
Fermentation
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Pathway of Cellular Respiration Glycolysis (Cytoplasm)
Krebs Cycle (Mito.) Electron Transport Chain (Mito.)
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Glycolysis “Glukus” = sweet “Lysis” = loosening Occurs in Cytoplasm Breaking one glucose down into 2
pyruvic acids(3 Carbon) & 2 ATP (net)
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After Glycolysis Anaerobic = Fermentation Aerobic = Cellular Respiration
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Fermentation Fermentation will make energy
without O2
Two typesAlcoholicLactic acid
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Alcoholic Yeast & other microorganisms CO2 causes bread to rise
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Lactic Acid Animal muscles Happens during vigorous exercise Builds up in muscles causing
cramps
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Krebs Cycle Follows glycolysis Needs oxygen
Respiration Occurs in mitochondria Breaks down products of glycolysis
into carbon dioxideReleasing energy to make electron
carriers and ATP
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Krebs Cycle
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Electron Transport Chain Inner membrane of mitochondria Electrons move to produce
energy
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ETC: Makes ATP – 2-3 per electron carrier Oxygen is used as the final electron
acceptor (H+) Forms water
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Mitochondrial membrane
NADHNADH enters and releases an H+ and an electron.
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Mitochondrial membrane
NADH enters and releases an H+ and an electron.
e-
NAD+
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Mitochondrial membrane
The electron travels to the next protein while simultaneously sending H+ across the membrane
e-
H+H+ H+
H+
H+H+ H+H+O
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Mitochondrial membrane
The electron is used to form water. The H+ then are pumped back into the mitochondria.
H+ H+H+
H+H+ H+
H2O
ADP
P
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Mitochondrial membrane
This allows ATP to be made each time a H+ enters back in.
H+
H+
H+
H+H+ H+
ATP
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Totals Glycolysis
Net 2 ATP Krebs
2 ATP ETC
Electron carriers =
32 ATP
**Total = 36 ATP
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Photosynthesis Vs Cellular Respiration
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