Cellular Respiration

8.3

I. Cellular Respiration

A. Cellular Respiration- The process that breaks down food molecules (glucose) into ATP1. Takes place mostly in the mitochondria

I. Cellular Respiration

B. Aerobic- Requires oxygen

C. Anaerobic- Does NOT require oxygen

I. Cellular Respiration

D. 3 Stages1. Glycolysis

2. Citric Acid Cycle3. Electron Transport Chain

a) Oxygen is the final electron acceptor required to start ETC

I. Cellular Respiration

See overhead for charts on glycolysis, acetyl coA formation, citric acid cycle and electron

transport chain

I. Cellular Respiration

See overhead for charts on glycolysis, acetyl coA formation, citric acid cycle and electron

transport chain

II. Fermentation

A. Occurs during times of intense exercise until oxygen is available again

II. FermentationB. Lactic Acid Fermentation

1. Glucose is converted pyruvic acid2. Pyruvic acid is converted to lactic acid

a. Causes muscle fatigue3. 2 ATP are produced

II. Fermentation

4. Anaerobic5. Takes place in mitochondria

II. Fermentation

C. Alcoholic Fermentation1. Glucose is converted to pyruvic acid2. The pyruvic acid is broken down into CO2 and alcohol3. 2 ATP are created

II. Fermentation

4. Anaerobic5. Takes place in mitochondria of yeast

II. Fermentation

4. Alcoholic fermentation is used in:

a. ethanol productionb. bread bakingc. beer & wine

5. Yeast do the fermentation

RECAP- What is the goal of

cellular respiration?- What are the 3 stages of

cellular respiration?- What are the beginning

reactants and ending products of each stage?

RECAP

- Why is oxygen important in respiration?

- What is the difference between lactic acid fermentation and alcoholic fermentation?