anaerobic respiration releasing the energy in glucose without oxygen fermentation and lactic acid...

8
Anaerobic Respiration Releasing the energy in glucose without oxygen Fermentation and Lactic Acid Formation

Upload: margery-robbins

Post on 28-Dec-2015

215 views

Category:

Documents


1 download

TRANSCRIPT

Page 1: Anaerobic Respiration Releasing the energy in glucose without oxygen Fermentation and Lactic Acid Formation

Anaerobic RespirationReleasing the energy in glucose without

oxygen

Fermentation and Lactic Acid Formation

Page 2: Anaerobic Respiration Releasing the energy in glucose without oxygen Fermentation and Lactic Acid Formation

What is anaerobic respiration?

In some situations, oxygen is not available, so cells are forced to perform a second type of respiration which is anaerobic respiration.

Anaerobic respiration is not nearly as efficient as aerobic respiration.

Not only is anaerobic respiration less efficient, it produces more toxic waste products.

Page 3: Anaerobic Respiration Releasing the energy in glucose without oxygen Fermentation and Lactic Acid Formation

Aerobic versus Anaerobic Respiration:Energy Produced.

In aerobic respiration one molecule of glucose yields 36 ATP.

In anaerobic respiration one molecule of glucose yields only 2 ATP.

Page 4: Anaerobic Respiration Releasing the energy in glucose without oxygen Fermentation and Lactic Acid Formation

Aerobic versus Anaerobic Respiration:Wastes Products.

Aerobic respiration produces two waste products, CO2 and H2O. These wastes are not particularly toxic.

Anaerobic respiration produces either ethyl alcohol or Lactic Acid. These are much more toxic and can damage or kill cells in relatively low concentrations.

Page 5: Anaerobic Respiration Releasing the energy in glucose without oxygen Fermentation and Lactic Acid Formation

Anaerobic Respiration: Fermentation

Fermentation: The anaerobic conversion of sugar to carbon dioxide and alcohol by yeast

The reaction:

C6H12O6 CH3OH + CO2 + 2 ATP

Glucose Ethyl Alcohol + Carbon Dioxide + 2ATP

Page 6: Anaerobic Respiration Releasing the energy in glucose without oxygen Fermentation and Lactic Acid Formation

Fermentation

Fermentation is a commerically important chemical reaction.

All Alcohol beverages are the result of this process.

As the alcohol level increases to about %13 percent, the yeast are killed by the alcohol.

Page 7: Anaerobic Respiration Releasing the energy in glucose without oxygen Fermentation and Lactic Acid Formation

Anaerobic Respiration: Lactic Acid Formation

In working muscles the level of available oxygen can drop dramatically.

This forces your muscle cells to begin anaerobic respiration.

The formulaGlucose Lactic Acid + 2 pyruvate + 2ATP.

You do not need to know the molecular formula for lactic acid formation.

Page 8: Anaerobic Respiration Releasing the energy in glucose without oxygen Fermentation and Lactic Acid Formation

Lactic Acid formation

Lactic acid is toxic to your cells The “burn” you feel during strenuous exercise is

caused by the build up of lactic acid in your muscle cells.

The burning and cramping continue to build until you are forced to stop exercising.

These symptoms continue until your circulatory system is able to provide these cells with oxygen and carries the lactic acid away.