B2 Aerobic and Anaerobic Respiration 0.0 / 5 ? BiologyRespiration and exerciseGCSEAQA Created by: EllenMIWCreated on: 31-12-15 19:53 What are chemical reactions in cells controlled by? Enzymes 1 of 14 Respiration occurs... in.... Continuously, plants and animals 2 of 14 Aerobic respiration word equation Oxygen + Glucose - Carbon dioxide + water (+energy) 3 of 14 How is energy from respiration used in animals? Building larger molecules from smaller ones, maintaining steady body temp in cold (birds and mammals), contracting muscles 4 of 14 How is energy from respiration used in plants? Building larger molecules from smaller ones, building up sugars, nitrates and other nutrients into amino acids 5 of 14 Changes during exercise Heart rate increases, rate and depth of breathing increases 6 of 14 How do the changes that occur during exercise aid the body? Increase rate of blood flow to muscles, so increase supply of sugar and oxygen, so increase rate of CO2 removal 7 of 14 How do muscles store glucose? As glycogen, which can be converted back to glucose during exercise 8 of 14 When is anaerobic respiration used? When insufficient oxygen is reaching the muscles 9 of 14 Anaerobic respiration The incomplete breakdown of glucose, which produces lactic acid 10 of 14 Why does the oxygen debt have to be repaid? In order to oxidise lactic acid to carbon dioxide and water 11 of 14 Cause of muscle fatigue Build up of lactic acid 12 of 14 How is lactic acid removed from muscles? Blood flowing through muscles 13 of 14 Muscle fatigue Muscles stop contracting efficiently 14 of 14
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