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B2.4
Energy from respiration
Question | Answer |
---|---|
word equation for aerobic respiration? | glucose + oxygen ----> carbon dioxide + water (+energy) |
respiration takes place? | mitochondria |
number of mitochondria in a cell shows? | how active it is |
respiration's function? | energy warmth build large molecules from smaller ones, e.g. protein synthesis |
more oxygen needed during exercise because? | muscles contract more |
changes in circulatory system during exercise? | heart rate increases arteries supplying blood to muscles dilate (widen), allowing more O2 to get to muscles, and takes CO2 away. |
2 effects of exercise more regularly? | heart and lungs become larger more efficient blood supply |
if muscles work too hard they? | become fatigued and don't contract efficiently |
anaerobic respiration occurs when? | not enough O2 is supplied to the muscles |
aerobic respiration produces more energy than? | anaerobic respiration |
O2 is still needed after exercise to? | break down lactic acid into water and CO2 |
muscle fatigue is caused by? | lactic acid build up |
anaerobic respiration is less efficient because? | glucose is not completely broken down |
word equation for anaerobic respiration? | glucose ----> lactic acid (+energy) |