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10 Cards in this Set
- Front
- Back
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Describe and explain the exchange of oxygen between alveolus and capilliary
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Blood in the capillary has just returned to the lungs from the rest of the body so contains a low concentration of oxygen. The alveolus contains air which has just been breathed in it has a high concentration of oxygen . The oxygen diffuses out of the alveolus and into the capillary.
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What is the cause of emphysema?
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Emphysema is caused when smoke is inhaled into the lungs, it can damage the alveoli, causing them to fuse together, decreasing the surface area and reducing the rate of gas exchange
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What is the cause of bronchitis
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Bronchitis is caused by the irritation or infection of the bronchial tree making breathing difficult. This is often caused by smoking.
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What happens to our gas exchange system when we breathe out?
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Thorax - decreases on volume
Ribs - move in and down Lungs - Volume decreases Diaphragm - relaxes Pressure - increases |
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What happens to out gas exchange system when we breathe in?
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Thorax - increases in volume
Ribs - move up and out Lungs - expand Diaphragm - contracts Pressure - decreases |
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What stops the trachea from collapsing in on itself?
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C-shaped rings of cartilage in it's walls
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Why is anaerobic respiration bad for humans for long periods
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Lactic acid can build up in the muscles, causing cramps and less energy is released
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Differences between anaerobic and aerobic respiration
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Aerobic - requires oxygen
produces more energy doesn't produce lactic acid fully breaks down glucose Anaerobic - doesn't require oxygen releases less energy creates lactic acid partially breaks down glucose |
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Anaerobic Respiration in plants
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Glucose -> ethanol + carbon dioxide
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Balanced Symbol equation for Aerobic respiration
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6 O2 + C6H12O6 -> 6 CO2 + 6 H2O
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