Anaerobic Respiration

It just means without oxygen.

It takes place in animal and plant cells and some microorganisms when there is very little or no oxygen.

When you do vigorous exercise your body can't supply enough oxygen to your muscles for aerobic respiration so respires anaerobically.

If the soil in a plant becomes waterlogged and there is no oxygen available to the roots the plant respires anaerobically.

Bacteria can get under our skin through puncture wounds - under the skin there is very little oxygen which is when the bacteria needs to respire anaerobically to survive.

Energy is always released and the reactants and products are different depending on the type of cell.

Lactic acid and the reactant is glucose. This is what we call cramp.

Ethanol and carbon dioxide.

Its when micoorganisms break down sugars into other products as they respire anaerobically. Humans use fermentation to make lots of things.

1. Biogas 2. Bread 3. Alcohol

Biogas fuel is used for things like heating and lighting. Lots of different microorganisms are used to produce biogas. They ferment plant and animal waste which contains carbohydrates (glucose). This produces mainly methane and carbon dioxide.

The microorganism yeast ferments the flour which contains carbohydrates (glucose) and releases carbon dioxide to make the bread rise.

Alcohol or ethanol is made when the yeast ferments the sugar to form ethanol - the sugar is in things like grapes (wine) and barley (beer).