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level: Respiration

Questions and Answers List

level questions: Respiration

QuestionAnswer
Give four reasons why organisms need energy?1)to drive chimical reeactions that keep organisms alive 2)movement - to contract muscles or for movement of substances in plants 3)cell division 4)to maintain constant conditions in the cells and the body
Where in a cell does respiration occur?Aerobic-First stages in cyptoplasm but most energy is released in mitochondria Anaerobic-Only in cyptoplasm
What is the balanced word equation for Aerobic respiration?C6H12O6 + 60S --> 6H20 + 6CO2 (+ energy) glucose --> lactic
What are the balanced word equations for Anerobic respiration in both ANIMALS and PLANTS?Animals: glucose --> lactic acid (+ energy) Plants: glucose → ethanol + carbon dioxide (+ energy)
Why do muscles need additional energy when excersizing?1)Breathing rate increases to bring more oxygen in and release more carbon dioxide 2)Heart rate increases to supply muscles with more oxygen and remove more carbon dioxide
What 2 things happen as a result of anaerobic respiration?1)lactic acid levels build up 2)glycogen reserves in the muscle become low as more glucose is used up
What are the 2 things that lactic acid can be converted to using oxygen?1)oxidised --> carbon dioxide and water 2)converted to glucose then glycogen restoring the glycogen levels in the liver and muscles