1. Anaerobic Respiration
SC.912.L.18.6

2. Essential Question
Is anaerobic respiration important to human society?

3. Anaerobic Respiration
Cellular respiration that you have already studied requires oxygen.
Anaerobic respiration is a way to produce ATP without oxygen. It produces less ATP than aerobic respiration.

4. What happens without oxygen?
Like aerobic respiration, anaerobic respiration begins with glycolysis.
When oxygen is present the electron transport chain converts NADH back to NAD+. Without oxygen there are two options.

5. What happens without oxygen?
Lactic Acid Fermentation
Alcoholic Fermentation
Formula
Pyruvate + NADH  lactic acid + NAD+
Pyruvate + NADH  ethyl alcohol + NAD+ + CO2
Organisms
Fungi, Bacteria, Humans*
Yeast
Products
Yogurt, Soy sauce, KimChee
Bread, Beer, Wine

6. Day 2: Anaerobic Respiration
When there is not enough oxygen available for aerobic respiration, mammals can switch to another, less efficient, method of releasing energy – __________ respiration. This process is shown below:
________  ________ _______ + Energy
If lactic acid builds up, it causes the muscles to ache. However, it can be broken down as soon as more oxygen is available. The oxygen needed to break down the lactic acid is called the oxygen _____.

7. Day 2: Anaerobic Respiration
When there is not enough oxygen available for aerobic respiration, mammals can switch to another, less efficient, method of releasing energy – __anaerobic________ respiration. This process is shown below:
___Glucose__  _lactic_ _Acid_ + Energy
If lactic acid builds up, it causes the muscles to ache. However, it can be broken down as soon as more oxygen is available. The oxygen needed to break down the lactic acid is called the oxygen _debt.

8. Day 2: Fermentation Makes you feel the Burn
IsoKinetic Motion
Have each student make some sort of isometric motion.
Repetitive motion
Large muscles movements. Squats or pushups.

9. Day 2: Yeast Lab
Place a spoonful of yeast in warm sugar water and leave covered.
Have students compare with yeast in water only.
1. Record observations: Visual, smell, temperature, etc.
2. Write the formula for what occurred.

10. Day 3 How does this article show how science changes over time?
What steps were involved in changing how other scientists viewed lactic acid?