Revision Cards - Biology - 8 0.0 / 5 ? BiologyExchange of materialsGCSEEdexcel Created by: HingesCreated on: 12-08-20 19:12 Give one way in the alveoli are adapted for gas exchange 1. They have large surface area 2.Moist lining for dissolving gases 3. This walls 4.Good blood supply 1 of 29 Describe the purpose of platelets in the blood They help to clot the blood to stop the blood pouring out 2 of 29 Whats the advantage of the capillary walls only one cell thick? It increases the rate of diffusion of substances across blood and cells 3 of 29 Give the formula to calculate cardiac output cardiac output (bpm) = heart rate * stroke volume 4 of 29 Where does the gas exchange take place within lungs? Alveoli 5 of 29 Describe the shape of an erythrocyte Biconcave disc shape 6 of 29 What is the name of the pigment contained within the red blood cells ? Haemoglobin 7 of 29 What does the haemoglobin do? It contains iron and it binds to oxygen to become oxyhaemoglobin. 8 of 29 What will happen if there weren't enough platelets? 1. Blood will not clot 2. Increased risk of microorganisms getting in 9 of 29 Do arteries carry blood away from or towards heart? Away 10 of 29 Do veins carry blood away from or towards heart? Towards 11 of 29 What are capillaries? Blood vessels that are involved in the exchange of materials at the tissues 12 of 29 Name 3 blood vessels designed with regards to circulatory system Arteries, Veins and Capillaries 13 of 29 What is the function of the valves in the veins? To keep the blood flowing in the right direction 14 of 29 What is the blood vessel that carries blood into the right atrium vena cava 15 of 29 What is the blood vessel that carries blood towards the lungs pulmonary artery 16 of 29 What is the blood vessel that carries blood into the left atrium pulmonary vein 17 of 29 What is the blood vessel that carries blood into the left ventricle aorta 18 of 29 What is the purpose of cellular respiration? To transfer / release energy by breaking down organic compounds 19 of 29 What is respiration The process of transferring energy by breaking down the organic compunds 20 of 29 State 2 types of respiration 1. Aerobic 2. Anaerobic 21 of 29 Which type of respiration happens when plenty of oxygen is available? Aerobic 22 of 29 Which type of respiration happens when body can't supply enough oxygen Anaerobic 23 of 29 Is respiration endothermic or exothermic ? Why? Exothermic - because energy is transferred into the environment 24 of 29 Give the equation of the Aerobic respiration glucose + oxygen ------> carbon dioxide + water 25 of 29 Give the equation of the Anaerobic respiration in animals glucose -------> lactic acid 26 of 29 Give the equation of the Anaerobic respiration in plants glucose -----> ethanol + carbon dioxide 27 of 29 Whats the purpose of a respirometer? To measure the oxygen consumption of respiring organisms 28 of 29 Whats the purpose of soda lime water in respirometer? It absorbs the carbon dioxide produced by the woodlice 29 of 29
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