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Gas Exchange
We need to get oxygen into the blood from the air, and we need to remove waste
carbon dioxide from the blood into the air. Moving gases like this is called gas
exchange. The alveoli are adapted to make gas exchange in the lungs happen easily
and efficiently. Alveoli allow this because they give the lungs a really big surface
area, have moist thin walls (just one cell thick) and they have a lot of tiny blood
vessels called capillaries.
If you do a lot of exercise, your cells need a lot of energy and therefore a lot of
oxygen and glucose. Your heart beats faster to speed up the supply of oxygen and
glucose to your cells. However during intense exercise your heat cannot supply your
cells quickly enough to release all the energy they need.
During intense exercise, your cells start to do a different type of respiration, anaerobic
respiration (respiration without oxygen). Anaerobic respiration releases less energy
and make a chemical called lactic acid. This can cause cramp. It is not just during
exercise that your cells do not get enough oxygen, illness and high altitude can also
reduce the oxygen supply to your cells.
Gas Exchange
We need to get oxygen into the blood from the air, and we need to remove waste
carbon dioxide from the blood into the air. Moving gases like this is called gas
exchange. The alveoli are adapted to make gas exchange in the lungs happen easily
and efficiently. Alveoli allow this because they give the lungs a really big surface
area, have moist thin walls (just one cell thick) and they have a lot of tiny blood
vessels called capillaries.
If you do a lot of exercise, your cells need a lot of energy and therefore a lot of
oxygen and glucose. Your heart beats faster to speed up the supply of oxygen and
glucose to your cells. However during intense exercise your heat cannot supply your
cells quickly enough to release all the energy they need.
During intense exercise, your cells start to do a different type of respiration, anaerobic
respiration (respiration without oxygen). Anaerobic respiration releases less energy
and make a chemical called lactic acid. This can cause cramp. It is not just during
exercise that your cells do not get enough oxygen, illness and high altitude can also
reduce the oxygen supply to your cells.
List three ways which alveoli are adapted to allow gas exchange:
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List three ways which alveoli are adapted to allow gas exchange:
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List three ways which alveoli are adapted to allow gas exchange:
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List three ways which alveoli are adapted to allow gas exchange:
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Why is anaerobic respiration not as efficient/good as aerobic respiration?
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Why is anaerobic respiration not as efficient/good as aerobic respiration?
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Why is anaerobic respiration not as efficient/good as aerobic respiration?
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Why is anaerobic respiration not as efficient/good as aerobic respiration?
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Why is anaerobic respiration not as efficient/good as aerobic respiration?
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Why is anaerobic respiration not as efficient/good as aerobic respiration?
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Why is anaerobic respiration not as efficient/good as aerobic respiration?
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When does your body need to use anaerobic respiration?
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When does your body need to use anaerobic respiration?
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When does your body need to use anaerobic respiration?
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When does your body need to use anaerobic respiration?
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When does your body need to use anaerobic respiration?
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