some muscles have the ability to produce more mitochondria if they are involved in regular exercise

cellular respiration rates would increase in the individuals cells
more fat molecules would be burned by the individual
the individuals mass would increase due to the excess mitochondria
the individual would not need as much food as before

Question

some muscles have the ability to produce more mitochondria if they are involved in regular exercise

cellular respiration rates would increase in the individuals cells
more fat molecules would be burned by the individual 
the individuals mass would increase due to the excess mitochondria
the individual would not need as much food as before

anonymous · Answer

B

javk · Answer

Cellular respiration rates would increase in the individuals cells because mitochondria is used in cellular respiration, and consequently increasing the number of mitochondria will increase the rate of respiration in the cell.

It might be tempting to say more fat molecules would be burned by the individual but fat loss isn't directly linked to the rate of respiration. 
It is equally possible that the body is burning off carbs, as they more readily available in the blood stream and release more energy in the form of ATP molecules. Once the body exhausts its supply of readily available glucose sugar molecules, only then does it search for other sources of energy and that's when it may burn off some fat. That's about 15 mins after having started exercise