Biology (B2) - Energy from Respiration

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  • Created by: Roma
  • Created on: 20-12-13 18:45
What is the equation for aerobic respiration?
glucose + oxygen --> carbon dioxide + water (+energy)
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Where does most aerobic respiration take place?
The mitochondria.
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What is the energy released during aerobic respiration used for?
Build larger molecules from smaller ones, enable muscle contraction, maintain constant body temperature, build sugars, nitrates and other nutrients into amino acids and then proteins in plants.
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What should increase with exercise?
The rate at which oxygen and glucose reach the muscle cells for aerobic respiration. Waste carbon dioxide also needs to removed more quickly.
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What happens during exercise?
The heart rate increases and blood vessels supplying the muscles widen, so more blood can reach the muscles. Breathing rate and depth also increase allowing a greater uptake of oxygen and release of CO2 at the lungs.
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How do muscles store glucose?
As glycogen, which can be converted back to glucose for use during exercise.
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What happens if you use your muscles over a long period of time?
They will get tired and stop contracting efficiently. Muscle fatigue can also be caused by a build up of lactic acid.
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What is anaerobic respiration?
When the glucose is not completely broken down and lactic acid is produced. Less energy is released.
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When do you respire anaerobically?
When you're muscles cannot get enough oxygen for aerobic respiration.
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How do you get rid of lactic acid?
Move around lightly so blood flows through the muscles which removes lactic acid.
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What is produced during anaerobic respiration?
Lactic acid and energy.
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What is oxygen debt?
When the exercise has finished lactic acid must be fully broken down. A lot of oxygen is needed to do this and this extra oxygen is oxygen debt. Eventually the oxygen oxidises lactic acid into carbon dioxide and water.
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Card 2

Front

Where does most aerobic respiration take place?

Back

The mitochondria.

Card 3

Front

What is the energy released during aerobic respiration used for?

Back

Preview of the front of card 3

Card 4

Front

What should increase with exercise?

Back

Preview of the front of card 4

Card 5

Front

What happens during exercise?

Back

Preview of the front of card 5
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