CELLULAR RESPIRATION Occurs in the MITOCHONDRIA of the cell Cellular Respiration is : the process that releases energy (exergonic) by breaking down food molecules in the presence of oxygen. Both Plants and Animals complete cellular respiration.

Respiration occurs in all life forms and in all cells.

Cellular Respiration KREBS CYCLE 34 ATP

Glycolysis Breaking down Sugar (glucose) When one molecule of glucose is broken in half, producing pyruvic acid and high energy electrons (NADH) Occurs in the : Cytoplasm Requires 2 ATP to start Makes 2 ATP KREBS CYCLE 34 ATP

Krebs Cycle Also called the citric acid cycle Occurs after glycolysis Occurs in the mitochondria During the Krebs Cycle, pyruvic acid is broken down into carbon dioxide, and high energy electrons are released. Creates 2 ATP

Cellular Respiration KREBS CYCLE 34 ATP

Electron Transport Chain Uses high-energy electrons from the Krebs cycle to convert ADP into ATP. Like a stair step. Electron transport chain creates: 34 ATP A TOTAL of 38 ATP are formed overall, but 2ATP are used in Glycolysis leaving a net of 36 ATP.

Cellular Respiration KREBS CYCLE 34 ATP

Total energy produced by aerobic respiration = 36 ATP

AEROBIC Respiration Aerobic = With Oxygen present Aerobic cellular : respiration with oxygen creates 36 total ATP WHAT HAPPENS IF THERE IS NO OXYGEN?

ANAEROBIC RESPIRATION Cellular Respiration without oxygen is anaerobic respiration 2 types: Alcoholic Fermentation: When yeast uses cellular respiration to create alcohol and 2 ATP Lactic Acid Fermentation: occurs in cells when there is not oxygen, cellular respiration gets stuck in glycolysis only creates 2 ATP. Forms LACTIC ACID build up in muscles.

Ethyl Alcohol Anyone? Used by yeast (unicellular fungus) organisms to make bread, beer, and wine. Releases Carbon Dioxide that bubbles- causes carbonation in beer & pockets of air in bread Don’t get excited- the alcohol evaporates as bread bakes (but gives beer & wine its alcohol). Glucose+4 ADP+4P Ethanol + 2CO2 + 4 ATP

Lactic Acid build up makes muscles sore

Chemical Pathways Glucose Glycolysis Electron Transport Krebs Cycle Fermentation (without 0xygen) Alcohol or lactic acid

Comparing Photosynthesis and Cellular Respiration Function Energy storage Energy release Location Chloroplasts Mitochondria Reactants CO2 and H2O C6 H12O6 and O2 Products C6H12O6 and O2 Equation 6CO2 +6H2O -> C6H12O6+ 6O2 6O2 + C6H12O6-> 6CO2 + 6H2O