AQA Biology Unit 3 AQA Biology Unit 3 4.0 / 5 based on 39 ratings ? BiologyGCSEAll boards Created by: TaranCreated on: 27-03-11 15:41 Why are the alveoli important? For the diffusion of gases. 1 of 16 What are the four main types of adaptations of gaseous exchange? Rich Blood Supply, thin walls, large surface areas and a moist surface area. 2 of 16 How many gills do fish have altogether? 4 3 of 16 What are stomata? Tiny holes on the surface of the leaf. 4 of 16 Why do insects loose a lot of water. They have a small surface area 5 of 16 What is transpiration? The loss of water through the surface of the leaf. 6 of 16 What are the components of blood? Red blood cells, white blood cells, plasma and platelets. 7 of 16 What does plasma do? Moves hormones and blood cells, takes CO2 to the lungs and transports the waste urea from the liver to the kidney. 8 of 16 What substances do red blood cells contain and what does it turn into when oxygenated. Haemoglobin and Oxyhaemoglobin. 9 of 16 What is the equation for aerobic respiration? Glucose+Oxygen-->Carbon Dioxide+Water+Energy (ATP) 10 of 16 What is the vena cava? It is the main vein carrying deoxygenated blood from the body to the heart. 11 of 16 How does active transport differ from diffusion? It goes against the concentration gradient. 12 of 16 What is the pulmonary artery? It is the artery that takes deoxygenated blood from the heart to the lungs. 13 of 16 What is the aorta? It is the main artery carrying oxygenated blood from the heart to the rest of the body. 14 of 16 What is the equation for anaerobic respiration of yeast to produce ethanol? Glucose--> Ethanol+Carbon Dioxide+Energy(ATP) 15 of 16 What is the pulmonary vein? It is the vein that takes oxygenated blood from the lungs to the heart. 16 of 16
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