Biology - Year 10 mock exam 4.0 / 5 based on 5 ratings ? BiologyrevisionGCSEAQA Created by: bethany.steerCreated on: 01-12-16 10:23 What do the arteries do? Carry blood at high blood pressure away from the heart. 1 of 28 What do the cappillaries do? They are any of the fine branching blood vessels that form a network between aterioles and venules. 2 of 28 What are the veins? Tubes forming part of the blood circulation carrying mainly oxygenated blood towards the heart. 3 of 28 What does the term oxygenated mean? To combine or mix with oxygen. 4 of 28 What does the term deoxygenated mean? No oxygen. 5 of 28 Blood (1) Transports hormones- adrenelin. Transports heat - plasma. Transports waste. Transports glucose. 6 of 28 Blood (2) Clots platelets. 7 of 28 Blood (3) Carries oxygen around the body - red blood cells - lungs - organs and all cells - aerobic respiration. 8 of 28 Blood (4) White blood cells fights pathogens - antibodies - bacteria - fungi - virus. 9 of 28 Arteries - Thick layer of muscle. - Narrow central tube - Small lumen 10 of 28 Cappillaries. -Very thin walls for the exchange of substances. (diffusion). - Big lumen - Valves 11 of 28 Veins - Thin walls. - Single Cell. -Have valves to prevent backflow. 12 of 28 Stem cells. Can develop into another cell. -totipotent 13 of 28 What is the stamata? Stamata are holes in the bottom of leaves. They allow gas carbon dioxide to pass into the leaf. Needed for photosynthesis. 14 of 28 What does the xylem do? Transports water. 15 of 28 What does the phoelem do? Transports sugar away. 16 of 28 Which blood vessel supplies the heart muscle with oxygen? Coronary Artery. 17 of 28 Which one of the following is an example of a plant organ? Flower. 18 of 28 What does a potometer measure? Water uptake. 19 of 28 What is the function of the palisode mesophyll? Photosynthesis. 20 of 28 What is the function of the spongy mesophyll? Gas exchange. 21 of 28 Red blood cell. Biconcave shape. 22 of 28 What is transpiration? Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. 23 of 28 What factors affect transpiration? Humidity, Temperature, Water, Wind 24 of 28 What factors affect transpiration? (1) Light- In bright light transpiration increases, stomata open wider. 25 of 28 What factors affect transpiration? (2) Temperature- Transpiration is faster in higher temperatures. - Evaporation and diffusion faster. 26 of 28 What factors affect transpiration? (3) Transpiration is faster in windy conditions. - Water vapour is removed quickly by air. 27 of 28 What factors affect transpiration? (4) Humidity - Transpiration is slower in humid conditions. -diffusion of water vapour out of the leaf slows down. 28 of 28
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