Types of Respiration.

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What is the equation for aerobic respiration?
glucose + oxygen --> carbon dioxide + water + ENERGY.
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Where does aerobic respiration occur?
The mitochondria.
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Which types of cells tend to have more mitochondria?
Those requiring more oxygen, such as muscle cells.
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Where does the glucose from respiration come from?
In animals it comes from food molecules or the body stores, and in plants the glucose is a product of photosynthesis.
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Where are the necessary substances for respiration carried?
In the blood.
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Why does the rate of respiration increase during exercise?
Your muscles are contracting more frequently and so need more energy, which comes from photosynthesis.
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What happens when you begin exercising in terms of glucose movement?
The glucose moves from the muscle cells into the mitochondria, then from the blood to the mitochondria, and if there is not enough glucose from these sources then glycogen in broken down from the muscles and liver.
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Why does your heart beat faster during exercise?
The blood needs to circulate faster to supply the extra oxygen and glucose, and to take away the extra carbon dioxide produced, so the heart beats faster to facilitate this.
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Why do you breathe more quickly during exercise?
The oxygen and carbon dioxide in the blood have to be exchanged faster with the air in the lungs.
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Why do muscles fatigue?
Chemicals build up within the cells, and some that are needed for reactions start to run out.
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Why do muscles have to resort to anaerobic respiration?
If you start exercising very suddenly and violently, or you exercise violently for long periods of time, then there may not be enough oxygen.
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What the equation for anaerobic respiration?
glucose --> lactic acid + ENERGY.
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Why does anaerobic respiration release less energy than aerobic respiration?
The glucose is not fully broken down - lots of energy is still locked up in the lactic acid bonds.
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Why do you continue to breathe deeply once you have finished exercising?
Your body acquires an oxygen debt, and the extra oxygen is needed to restore the body to its resting state, and to break down the lactic acid if anaerobic respiration has occurred.
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How is lactic acid broken down after exercise?
It is transported in the blood to the liver where it is oxidised to be used to aerobic respiration at another point.
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What is another term for lactic acid?
Lactate.
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Card 2

Front

Where does aerobic respiration occur?

Back

The mitochondria.

Card 3

Front

Which types of cells tend to have more mitochondria?

Back

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Card 4

Front

Where does the glucose from respiration come from?

Back

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Card 5

Front

Where are the necessary substances for respiration carried?

Back

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