1) Respiration is a) the elimination of undigested food materials from the gut. b) the removal of metabolic waste from metabolism. c) the chemical breakdown of organic substances or food to release energy. d) the movement of air in and out of the lungs by the movement of muscles and bones. 2) Which below is NOT an importance of respiration? a) provides all cells with energy. b) powers all life processes carried out by cells. c) releases carbon dioxide which is used as a reagent in photosynthesis. d) helps recycles carbon dioxide as it is released into the atmosphere when excreted from the lungs. e) it removes stool from the body. f) it regulates the concentration of gases in the blood. 3) Cellular respiration mainly occurs in the a) cytoplasm b) mitochondria c) nucleus d) chloroplast 4) Respiration cease when the organism is dead. True or False a) True b) False 5) Respiration is carried out by animals only. True or False. a) True b) False

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