Anaerobic respiration Flashcards
What is the main difference between aerobic and anaerobic respiration?
Aerobic respiration uses oxygen to break down glucose, anaerobic respiration does not
When does anaerobic respiration take place?
When there is not enough oxygen for aerobic respiration to take place - often during strenuous exercise
What are the reactants in anaerobic respiration?
Just glucose
What are the products of anaerobic respiration?
Lactic acid and energy
What are the 2 reasons that the body normally respires aerobically?
1) Aerobic respiration releases more energy than anaerobic respiration
2) Lactic acid causes painful muscle cramps
What is an oxygen debt?
The amount of oxygen required to break down the lactic acid produced by anaerobic respiration
What other organisms respire anaerobically?
Animals - when they exercise strenuously
Plant roots - in waterlogged soil
Microorganisms - when there is no oxygen available
What is anaerobic respiration in microorganisms called?
Fermentation
What are the reactants in fermentation?
Just glucose
What are the products of fermentation?
Ethanol, carbon dioxide and energy
List 3 products made using fermentation
Bread, beer and wine
Name a microorganism that uses fermentation in the bread making process
Yeast
How is bread made?
Flour, water and yeast are mixed together. The yeast ferments the glucose in the flour into carbon dioxide and ethanol. The carbon dioxide is trapped in the dough and makes the bread rise. The ethanol evaporates during baking.
How is beer and wine made?
Fermenting barley grains (beer) and grapes (wine). The yeast ferments the sugar into alcohol
