Cellular Respiration Song

1) Glycolysis Recap

2) Krebs Cycle Recap

3) ETC Recap

What happens if cells do not receive enough oxygen? Fermentation (aka: Anaerobic Respiration)

2 steps for Anaerobic Respiration 1. Glycolysis - same as aerobic respiration 2. Fermentation - allows the production of a small amount of ATP without oxygen -2 types

CO2 + H2O

1) Lactic Acid Fermentation Occurs in muscle cells of animals (& humans) When you exercise and can’t take in oxygen as fast as your muscles need, then your muscle cells produce lactic acid (makes your muscles sore!)

2) Alcohol Fermentation Yeast and some bacteria produce alcohol & CO2 when they perform fermentation. We humans use both types of fermentation to make foods (like bread, cheese, sour cream, pickles, yogurt) and alcoholic beverages.

Total # ATP from 1 molecule of glucose during anaerobic respiration? 2 ATP Produced Compare to 34 ATP produced during aerobic respiration

Other fuels for Respiration Other fuels for respiration besides glucose: glycogen, starch, proteins, fats

Exercise & training Strenuous exercise both aerobic & anaerobic Lifting heavy weights – 100% anaerobic Marathon = 99% aerobic Soccer or basketball game = 80% aerobic Improve ATP production through training Anaerobic sprints increase glycogen in muscles & more tolerant to lactic acid Aerobic long runs increase size & # of mitochondria in muscles and improve heart & lungs delivery of oxygen

Comparison of 2 types of Respiration Aerobic Requires oxygen Includes Glycolysis, Kreb’s cycle, & ETC Produces 36 ATP per glucose Anaerobic No oxygen AKA fermentation - 2 types (Lactic Acid & Alcohol) Includes Glycolysis Produces 2 ATP per glucose

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