Cellular Respiration – Aerobic, Anaerobic, & Fermentation Mr. Banwart Biology

Photosynthesis & Respiration 

Oxygen & Cellular Respiration  Cellular respiration has 2 paths  Aerobic  With oxygen present  Anaerobic  without oxygen present Cellular Respiration Anaerobic Aerobic Glycolysis Krebs Cycle electron chain Fermentation

Aerobic  If oxygen is present…  Glycolysis runs and the products are moved onto the Krebs cycle & the electron transport chain

Anerobic  If oxygen is not present…  Glycolysis can continue through the process of fermentation  2 types  Lactic  alcoholic

Lactic Acid Fermentation  Lactic acid fermentation  Used by most organisms to produce ATP without the presence of oxygen

Alcoholic Fermentation  Alcoholic fermentation  Used by yeast and some other microorganisms  This process is used to make alcoholic drinks

Fermentation and an oxygen debt  Lactic fermentation can only provide so much energy…  After 90 seconds, oxygen must be used to create more ATP  This is why you huff and puff after longer exercises  Your body is trying to get enough oxygen to replenish ATP stores

Graph Reading and analysis  Use the graph to answer the following questions

Graph Reading and analysis  As the exercise difficulty increased, what happened to oxygen uptake?

Graph Reading and analysis  Between what level of difficulty did the uptake reach 2?