Science B1

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  • Created by: Aj4
  • Created on: 14-05-16 15:51
What is systolic pressure?
When the heart contracts and the blood pressure is at its highest.
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What is diastolic pressure?
When the heart relaxes in between beats.
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What can happen if a persons blood pressure gets too high?
If blood pressure gets too high blood vessels can burst and this can lead to a stroke, brain damage and kidney damage.
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What can happen if a persons blood pressure gets too low?
If blood pressure gets too low it can cause bad circulation, dizziness and fainting.
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What two features in a cigarette can increase blood pressure and why?
Carbon monoxide: combines with the haemoglobin in the blood which reduces the amount of oxygen carried by the red blood cells which cause the heart rate to increase. Nicotine: increases heart rate, which increases blood pressure.
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How can foods with high saturated fats cause heart disease?
They cause cholesterol to build up in the arteries, this forms plaque which narrows the arteries and puts the blood under more pressure.
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What are the four types of infectious disease?
Fungi, Bacteria, Virus and Protazoa.
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What's a vector?
Something that can carry a disease without getting it.
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What's the three lines of attack made by a white blood cell?
Consume, Antitoxins, Antibodies.
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What do antibiotics do?
A drug that kills bacteria without harming your body cells.
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What do antivirals do?
Treat viral infections, stop them from reproducing.
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What does the Cornea do?
The cornea refracts light into the eye.
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What does the iris do?
The iris controls the amount of light let into the eye through the pupil.
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What does the lens do?
The lens also refracts light, focusing it on the retina.
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What does the retina do?
The retina is th light sensitive part and its covered in receptors called rods and cones.
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What is the order of the reflex arc?
stimulus>sensory neuron>relay neuron>motor neuron>effector
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What are auxins?
Auxins are a plant hormone found at the tip of the plant.
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What is the name given to plants growing in response to light?
Phototropism
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What is the name given to plants growing in response to gravity?
Geotropism
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what are these things broken down into: carbohydrates, proteins, fats
Carbohydrates > glucose Proteins > amino acids Fats > glycerol + fatty acids
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What are first class proteins?
First class proteins are essential amino acids
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Other cards in this set

Card 2

Front

What is diastolic pressure?

Back

When the heart relaxes in between beats.

Card 3

Front

What can happen if a persons blood pressure gets too high?

Back

Preview of the front of card 3

Card 4

Front

What can happen if a persons blood pressure gets too low?

Back

Preview of the front of card 4

Card 5

Front

What two features in a cigarette can increase blood pressure and why?

Back

Preview of the front of card 5
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