Biology Revision

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Created by: Jamie Hall
Created on: 27-04-19 15:54

Explain the required practical of measuring transpiration?

Shows that warmer conditions will result in a higher rate of transpiration therefore the plant needs more water.

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What are arteries?

• Carry Oxygenated blood • Thick Walls • High Pressure • Small Lumen • No valves

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What are veins?

• Carry Deoxygenated blood • Thin Walls • Low Pressure • Large Lumen • Valves

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What are capillaries?

• Allow oxygen and glucose to diffuse out of your body and into cells • Thin Walls • Low Pressure • Tiny Vessel • No valves

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Influences of CHD?

• Diet • Job • Disability • Social Life • Wealth • Stress • Gender • Genetics • Age

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What are the body defences?

• Skin • Tears • Ear Wax • Mucus • Bleeding • Stomach Acid

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Who is Alexander Fleming?

He discovered penicillin in 1928.

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What are the stages of drug development?

1. Work out what disease to treat 2. Traditional Remedies 3. Synthetic Chemicals 4. First tests in laboratory 5. Animal Testing 6. Phase 1: Test on students 7. Phase 2: Test on patients 8. Phase 3: Final tests and licensing

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Explain the required practical of light intensity in photosynthesis?

As the light intensity increases the number of bubbles per minute increases showing that the rate of photosynthesis has increased.

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What is oxygen debt?

The build up of lactic acid. When the exercise is over lactic acid has to be broken down to produce carbon dioxide and water. The amount of oxygen needed to break down the lactic acid is known as oxygen debt.

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