1. CELLULAR RESPIRATION Making ATP

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

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

4. The Two Types Aerobic Respiration Requires oxygen Fully breaks down glucose to CO 2 and makes LOTS of ATP Requires mitochondria Anaerobic Respiration No oxygen needed Glucose only partially degraded Makes small amounts of ATP more quickly No mitochondrial involvement

5. Aerobic Respiration Fuel + Oxygen + ADP + P  Carbon Dioxide + Water + ATP 3 stages, 2 of which take place in the mitochondria

6. Anaerobic Respiration Doesn’t fully break down the sugar So instead another product must be made via fermentation For example our muscles, when deprived of oxygen, generate lactic acid

7. Some organisms do both Some 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

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

9. Random Facts Every cell contains on average about a billion ATP molecules We have at any time about 1 sextillion (100,000,000,000,000,000,000,000) ATP molecules in our body We use all of them in minutes and must regenerate them The average ATP molecule is made and degraded 3 times per minute We go through about 20 pounds worth of ATP every hour http://www2.kprdsb.ca/cdciw/departments/Physical_ed/EXSCI%20LESSONS /UNIT2-ANATOMY/ANATOMY%20-%20ATP%20Energy%20System.pdf