Anaerobic respiration
This presentation is the property of its rightful owner.
Sponsored Links
1 / 14

Anaerobic Respiration PowerPoint PPT Presentation


  • 46 Views
  • Uploaded on
  • Presentation posted in: General

Anaerobic Respiration. All organisms need energy to survive. Animals obtain their energy from the food they eat, but plants can make their own food by photosynthesis.

Download Presentation

Anaerobic Respiration

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Anaerobic respiration

Anaerobic Respiration


Anaerobic respiration

All organisms need energy to survive.

Animals obtain their energy from the food they eat, but plants can make their own food by photosynthesis.

In both cases, however, energy must first be converted into a form that can easily be used by cells. This process is called respiration.


Anaerobic respiration

Aerobic respiration uses oxygen to break down glucose. It releases a lot of energy from each glucose molecule by breaking it down completely into carbon dioxide and water.

Anaerobic respiration takes place without oxygen.

Less energy is released per glucose molecule than in aerobic respiration because glucose is only partially broken down.


Respiration in animals

Respiration in animals

carbon dioxide

+

+

+

glucose

oxygen

water

( energy)

+

( energy)

glucose

lactic acid

When an animal cell is getting enough oxygen and glucose, it carries out aerobic respiration.

When the animal cell does not have the necessary oxygen to break down glucose molecules, it has to carry out anaerobic respiration. This can occur in muscle cells during strenuous exercise.


Anaerobic respiration

 carbon dioxide + ethanol (+ energy)

glucose

Plants and some micro-organisms, such as yeast, will also carry out anaerobic respiration if necessary.

Anaerobic respiration might take place in waterlogged root cells, or in bacteria infecting deep puncture wounds.

The products of anaerobic respiration are different in plants than in animals.


When does anaerobic respiration occur

When does anaerobic respiration occur?


Lactic acid

Lactic acid

The incomplete breakdown of glucose during anaerobic respiration produces lactic acid.

Lactic acid builds up in muscle cells and prevents the muscles from contracting efficiently. The build-up of lactic acid can cause fatigue, pain and cramping.

After vigorous exercise, the body needs to remove lactic acid before it damages cells. Some lactic acid is broken down in the muscles. Some passes into the bloodstream and is taken to the liver to be broken down there.


Oxygen debt

Oxygen debt

Oxygen is needed to break lactic acid into water and carbon dioxide.

Following strenuous exercise, an individual breathes heavily and maintains an elevated heart rate. This moves lactic acid to the liver and supplies liver and muscle cells with the necessary oxygen to break down lactic acid.

The amount of oxygen needed to break down lactic acid remaining after exercise is called excess post-exercise oxygen consumption (EPOC), oran oxygen debt.


How does running affect your pulse

How does running affect your pulse?


Complete the sentences

Complete the sentences


Anaerobic respiration

Respiring micro-organisms are used in the commercial production of many different products, including:

  • bread

  • alcohol

  • biofuels.

These micro-organisms break substances down using aerobic or anaerobic respiration. The effect of anaerobic respiration is often called fermentation.


Anaerobic respiration

Yeast is a type of fungus used in bread production. Yeast digests the carbohydrates in flour, producing carbon dioxide.

This carbon dioxide causes bread to rise. It also creates gas pockets in the dough, giving baked bread a spongy texture.

At first the yeast respires aerobically, but once it uses up the available oxygen it begins to respire anaerobically.


Anaerobic respiration

Yeast is used to make alcoholic beverages such as beer, wine, rum, whiskey and vodka.

During fermentation, anaerobic respiration in yeast cells converts glucose into ethanol.

The amount of ethanol produced is limited as alcohol becomes toxic to microbes at certain concentrations.

Glucose comes from different sources in the production of different alcohols. For example, in winemaking, natural sugars in the grapes form the energy source for yeast.


Anaerobic respiration in biogas

Anaerobic respiration in biogas


  • Login