bioligy unit 3

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what type of membrane in the cell membrane?
partially permiable
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why does active transport require energy?
becuase the particle are being absorbed again the concentration gradient
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why is glucose used during excersise?
glucose is used in the process of respiration to release energy
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how are mineral ions lost from the body during exercise?
through sweating
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which structure increase the surface area of the lungs?
aveoli
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which muscles contract when you breathe in?
intercostal muscles and diaphram
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give two features of the villi which make them efficient exchange surfaces.
large surface area, thin walls and god blood supply
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why do leaves have stomata?
to allow gases to diffuse in and out of a leaf
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by what process does water vapour move out of the leaves?
diffusion
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what is the function of valves in the heart?
valves prevent the back flow of blood
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what is the difference in structure between an artery and a vein?
artery's have thicker walls, and vein have valves along them to stop the back flow of blood
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why are stents used?
to open up blood vessels that have be narrowed by fatty deposits
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give an example of a gas transported by plasma?
carbon dioxide
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what is the function of platelets?
they help the blood clot around the site of a wound
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why is plasma given to patients?
to increase blood volume when a lot of blood has been lost
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what are the advantages to an artificial hearts?
they dont need to have a tissue match, there's no need for immunosuppressant drugs.
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what are the names of the two transport tissues in a plant?
xylem and phloem
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where is urea made?
urea is made in the liver
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what two processes occur in the kidney to make urine?
filtration of the blood, absorption of the substances needed in the body
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what is the purpose of dialysis?
removes urea from the blood along with any other toxins
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what are antigens?
proteins on the surface of cells
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where is blood temperature monitored?
in the thermoglatory centre in the brain
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explain why sweating cools the body?
the water in the sweat evaporate, energy from the skin turn water into water vapour do the skin cools
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which hormone reduces the level of glucose in the blood?
insulin
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name two method that are being developed to treat diabetes?
pancreas transplants,using stem cells to create insulin secreting cells
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why does building houses for humans affect animal and plants?
land has to be cleared, which destroys their habitats?
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why does landfill cause pollution?
toxins leak out into the surround soil and into underground water
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how are bird effected by acid rain?
damages trees which mean that birds loose food and habitiats
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which process removes carbon dioxide from the air?
by plants during photosynthesis and ocean absorbing it
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why might sea levels rise in the future?
if the climate gets warmer ice will melt
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how is ethanol extracted from a fermenter?
by distilltion
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which gas is the fuel in biogas?
methane
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why are farm animal sometimes kept in warm sheds?
to rpevent then from using energy from moving and to maintain body temperature, so energy is used for growing.
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/what type of food is produce by fusarium?
mycoprotein
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why do humans build dams?
to create reservoirs to store water in for human consuption
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Other cards in this set

Card 2

Front

why does active transport require energy?

Back

becuase the particle are being absorbed again the concentration gradient

Card 3

Front

why is glucose used during excersise?

Back

Preview of the front of card 3

Card 4

Front

how are mineral ions lost from the body during exercise?

Back

Preview of the front of card 4

Card 5

Front

which structure increase the surface area of the lungs?

Back

Preview of the front of card 5
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