CELLULAR RESPIRATION Making ATP. The Purpose Convert the energy in organic molecules into a usable form (ATP) ATP can then be used for work.

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  • The PurposeConvert the energy in organic molecules into a usable form (ATP)ATP can then be used for work

  • Who Goes Through Respiration?All living organisms go through some sort of cellular respiration (though many do not use the complete process) to make ATPPlants still go through cellular respiration!

  • The Two TypesAerobic RespirationRequires oxygenFully breaks down glucose to CO2 and makes LOTS of ATPRequires mitochondriaAnaerobic RespirationNo oxygen neededGlucose only partially degradedMakes small amounts of ATP more quicklyNo mitochondrial involvement

  • Aerobic RespirationFuel + Oxygen + ADP + P Carbon Dioxide + Water + ATP3 stages, 2 of which take place in the mitochondria

  • Anaerobic RespirationDoesnt fully break down the sugarSo instead another product must be made via fermentationFor example our muscles, when deprived of oxygen, generate lactic acid

  • Some organisms do bothSome organisms, such as humans, go through both aerobic and anaerobic respiration depending on the conditions

    Some organisms such as bacteria cannot go through aerobic respiration

  • What About the Maximum Effort?We have a very small supply of Creatine Phosphate that can be used to quickly generate ATPi.e. during weightliftingWe run out of this store in about 2-10 seconds of intense exerciseBUT we can regenerate some during periods of rest

  • Random FactsEvery cell contains on average about a billion ATP moleculesWe have at any time about 1 sextillion (100,000,000,000,000,000,000,000) ATP molecules in our bodyWe use all of them in minutes and must regenerate themThe average ATP molecule is made and degraded 3 times per minuteWe go through about 20 pounds worth of ATP every hourhttp://www2.kprdsb.ca/cdciw/departments/Physical_ed/EXSCI%20LESSONS/UNIT2-ANATOMY/ANATOMY%20-%20ATP%20Energy%20System.pdf


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