bioligy unit 3 4.0 / 5 based on 1 rating ? BiologyPhotosynthesis and transpirationGCSEAQA Created by: abbeyhuttonCreated on: 03-04-15 12:54 what type of membrane in the cell membrane? partially permiable 1 of 35 why does active transport require energy? becuase the particle are being absorbed again the concentration gradient 2 of 35 why is glucose used during excersise? glucose is used in the process of respiration to release energy 3 of 35 how are mineral ions lost from the body during exercise? through sweating 4 of 35 which structure increase the surface area of the lungs? aveoli 5 of 35 which muscles contract when you breathe in? intercostal muscles and diaphram 6 of 35 give two features of the villi which make them efficient exchange surfaces. large surface area, thin walls and god blood supply 7 of 35 why do leaves have stomata? to allow gases to diffuse in and out of a leaf 8 of 35 by what process does water vapour move out of the leaves? diffusion 9 of 35 what is the function of valves in the heart? valves prevent the back flow of blood 10 of 35 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 11 of 35 why are stents used? to open up blood vessels that have be narrowed by fatty deposits 12 of 35 give an example of a gas transported by plasma? carbon dioxide 13 of 35 what is the function of platelets? they help the blood clot around the site of a wound 14 of 35 why is plasma given to patients? to increase blood volume when a lot of blood has been lost 15 of 35 what are the advantages to an artificial hearts? they dont need to have a tissue match, there's no need for immunosuppressant drugs. 16 of 35 what are the names of the two transport tissues in a plant? xylem and phloem 17 of 35 where is urea made? urea is made in the liver 18 of 35 what two processes occur in the kidney to make urine? filtration of the blood, absorption of the substances needed in the body 19 of 35 what is the purpose of dialysis? removes urea from the blood along with any other toxins 20 of 35 what are antigens? proteins on the surface of cells 21 of 35 where is blood temperature monitored? in the thermoglatory centre in the brain 22 of 35 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 23 of 35 which hormone reduces the level of glucose in the blood? insulin 24 of 35 name two method that are being developed to treat diabetes? pancreas transplants,using stem cells to create insulin secreting cells 25 of 35 why does building houses for humans affect animal and plants? land has to be cleared, which destroys their habitats? 26 of 35 why does landfill cause pollution? toxins leak out into the surround soil and into underground water 27 of 35 how are bird effected by acid rain? damages trees which mean that birds loose food and habitiats 28 of 35 which process removes carbon dioxide from the air? by plants during photosynthesis and ocean absorbing it 29 of 35 why might sea levels rise in the future? if the climate gets warmer ice will melt 30 of 35 how is ethanol extracted from a fermenter? by distilltion 31 of 35 which gas is the fuel in biogas? methane 32 of 35 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. 33 of 35 /what type of food is produce by fusarium? mycoprotein 34 of 35 why do humans build dams? to create reservoirs to store water in for human consuption 35 of 35
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