Upload
june-smith
View
240
Download
0
Embed Size (px)
Citation preview
Chapter 9
Cellular Respiration The process that releases
energy (ATP) by breaking down food molecules in the presence of oxygen
Mitochondria Found?
Plant & Animal Cells Where respiration
takes placeJust aerobic parts
Aerobic Vs. Anaerobic Respiration Aerobic = presence of O2
Respiration
Anaerobic = absence of O2
Fermentation
Pathway of Cellular Respiration Glycolysis (Cytoplasm)
Krebs Cycle (Mito.) Electron Transport Chain (Mito.)
Glycolysis “Glukus” = sweet “Lysis” = loosening Occurs in Cytoplasm Breaking one glucose down into 2
pyruvic acids(3 Carbon) & 2 ATP (net)
After Glycolysis Anaerobic = Fermentation Aerobic = Cellular Respiration
Fermentation Fermentation will make energy
without O2
Two typesAlcoholicLactic acid
Alcoholic Yeast & other microorganisms CO2 causes bread to rise
Lactic Acid Animal muscles Happens during vigorous exercise Builds up in muscles causing
cramps
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
Krebs Cycle
Electron Transport Chain Inner membrane of mitochondria Electrons move to produce
energy
ETC: Makes ATP – 2-3 per electron carrier Oxygen is used as the final electron
acceptor (H+) Forms water
Mitochondrial membrane
NADHNADH enters and releases an H+ and an electron.
Mitochondrial membrane
NADH enters and releases an H+ and an electron.
e-
NAD+
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
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
Mitochondrial membrane
This allows ATP to be made each time a H+ enters back in.
H+
H+
H+
H+H+ H+
ATP
Totals Glycolysis
Net 2 ATP Krebs
2 ATP ETC
Electron carriers =
32 ATP
**Total = 36 ATP
Photosynthesis Vs Cellular Respiration