1. Lesson Overview Lesson OverviewFermentation Do Now (in Notes) One book per table 1. Turn to page 263 Draw Alcoholic and lactic acid fermentation 2. Make chart of what is going into the reactions and what is coming out of the reactions (one chart for lactic, one chart for Alcoholic)

2. Lesson Overview Lesson OverviewFermentation Lesson Overview 9.3 Fermentation

3. Lesson Overview Lesson OverviewFermentation Fermentation Fermentation is a process by which energy is made WITHOUT oxygen. Fermentation happens in the cytoplasm of cells.

4. Lesson Overview Lesson OverviewFermentation Alcoholic Fermentation Yeast uses alcoholic fermentation that produces ethyl alcohol and carbon dioxide. This process is used to make beer & wine and causes bread dough to rise.

5. Lesson Overview Lesson OverviewFermentation Alcoholic Fermentation Chemical equation: Pyruvic acid + NADH  Alcohol + CO 2 + NAD +

6. Lesson Overview Lesson OverviewFermentation Lactic Acid Fermentation Most organisms, including humans, convert pyruvic acid to lactic acid when no oxygen is available. Chemical equation: Pyruvic acid + NADH  Lactic acid + NAD +

7. Lesson Overview Lesson OverviewFermentation Cells contain small amounts of ATP produced during cellular respiration, enough for a few seconds of intense activity. Lactic acid fermentation can supply enough ATP to last about 90 seconds. For exercise longer than about 90 seconds, cellular respiration is the only way to continue generating a supply of ATP. A person huffs and puffs in order to pay back the built-up “oxygen debt” and clear the lactic acid from the body. Energy and Exercise

8. Lesson Overview Lesson OverviewFermentation 1. We use oxygen to release chemical energy from the food we eat, but what if oxygen is not around? What do our cells do 2. Is there a pathway that allows cells to extract energy from food in the absence of oxygen? If so what is its name?