If air is present during the production of biogas, this causes a high concentration of carbon dioxide to be produced because...
Air contains oxygen, which encourages aerobic bacteria to respire. This produces carbon dioxide.
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Ultrafiltration is...
When a high pressure is built up in the blood vessels, which forces substances out of the blood and into the Bowman's capsule.
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What is the name of the bacteria added to milk to make yoghurt?
Lactobacillus Casei
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What is an 'oxygen debt'?
The amount of oxygen needed to break down the lactic acid produced during anaerobic respiration.
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Anaerobic respiration occurs in humans when...
The body can't supply enough oxygen to the muscles.
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Anaerobic respiration in humans produces energy, as well as...
Lactic Acid
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What does each muscle have its own store of?
Glycogen
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What can arteries do to increase blood supply to the muscles?
Dilate
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What happens to useful substances in the nephrons?
They are reabsorbed back into the blood.
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What is dialysis fluid?
A fluid containing the ideal amounts of substances found in 'healthy' blood.
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What happens in a dialysis machine?
Blood flows past a selectively permeable membrane with dialysis fluid on the other side. This causes waste substances in the blood like urea to diffuse out of the blood and into the dialysis fluid.
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What is transpiration?
Transpiration is the loss of water vapour through the stomata in the leaves of a plant.
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What is formed when oxygen binds with haemoglobin in red blood cells?
Oxyhaemoglobin
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What substance found in milk is used by bacteria to create energy and lactic acid?
Lactose
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Diffusion occurs...
Along a concentration gradient.
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When dealing with microorganisms, it is important to sterelise equipment to prevent what?
Contamination
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What is the transpiration stream?
The movement of water and ions through a plant caused by transpiration (water loss) from the leaves.
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In schools, why are bacteria NOT grown above 25 degrees celsius?
Because microbes harmful to humans could be cultured.
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What do the veins have a system of to prevent blood flowing backwards due to the lower pressure?V
Valves
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What type of circulation do humans have?
Double Circulation
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During beer making, why are the barley grains allowed to germinate?
Because enzymes break down starch in the grains to make sugar.
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Other cards in this set
Card 2
Front
If air is present during the production of biogas, this causes a high concentration of carbon dioxide to be produced because...
Back
Air contains oxygen, which encourages aerobic bacteria to respire. This produces carbon dioxide.
Card 3
Front
Ultrafiltration is...
Back
Card 4
Front
What is the name of the bacteria added to milk to make yoghurt?
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