GCSE biology test one: 11/11/16

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What type of circulation system do humans have?
Double circulatory system
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How many chambers does the human hart have?
four
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What are white blood cells used for?
defence against desieses
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What are red blood cells used for?
taking oxygenated blood around the body
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What to platelettes do?
accumulate at a wound and clot the blood
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What is plasma and what does it do?
The watery part of blood - carrys amino acids, hormones, glucose, carbon dioxide, and salts
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What do arteries do?
take blood away from the hart at high pressure
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What do vains do?
take blood back to hart
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What are statins?
medication that lowers blood colestoral
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What is angioplasty?
a stent put into an artery using key hole surgery to prevent blood clots
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How does blood leave the lungs and where is it take to?
blood leavesthe lungs through the pulminary vain and is taken to the hart (left atrium)
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How does oxygenated blood leave the hart?
left ventrical contracts pushing blood out the hart through the aorta
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How does un-oxygenated blood return to the hart and where does it go?
un-oxygenated blood returns to the hart through the vina carva and goes to the right atrium
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How is blood re-oxygenated?
blood leaves hart and returns to the lungs where it is re-oxygenated
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What is the word & chemical equasion for photosymphasis?
carbon dioxide + water = glucose + oxygen (C6H1206)
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What are the limiting factors of photosymphasis?
sunlight,rainfal,CO2,temperature
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What are red blood cells also known as?
bioconcave disks
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What is the red pigment in red blood cells called?
haemoglobin
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When haemoglobin picks up oxygen it becomes?
oxy-haemoglobin
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Why dont red blood cells have a neucleus?
so they can have more haemoglobin and carry more oxygen
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What is pulminary circulation
blood traveling from the hart to the lungs
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What is systematic circulation?
blood traveling from the hart to the rest of the body
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What are phagocytes and what do they do?
types of white blood cells, they engulf pathogins and send out anti bodys
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What do coronary arteries do?
They take oxygen to the hart
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What happens if theres a colestoral build up the coronary arteries?
blood flow is restrected which could cause a hart attack
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What is the structure of arteries like?
1) small lumin 2) thick muscular wall
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What is the structure of vains like?
1) large lumin 2) thin muscular wall
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Why do vains have valves?
to prevent blood flowing in the wrong direction
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What is glucose used for?
1) stored as starch for future use 2) respiration 3) used to make cellulose 4) converted into oils and stored in seeds 5) make protines
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Why is glucose in plants stored as starch?
to prevent it leaving the plant via diffusion (starch is too thick to get through the cell wall)
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What do plants need to produce protines?
Glucose (starch) and nitrogen (nitrates)
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Other cards in this set

Card 2

Front

How many chambers does the human hart have?

Back

four

Card 3

Front

What are white blood cells used for?

Back

Preview of the front of card 3

Card 4

Front

What are red blood cells used for?

Back

Preview of the front of card 4

Card 5

Front

What to platelettes do?

Back

Preview of the front of card 5
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