AP BIOLOGY

Detailed explanation-1: -Humans undergo lactic acid fermentation when the body needs a lot of energy in a hurry. When you are sprinting full speed, your cells will only have enough ATP stored in them to last a few seconds. Once the stored ATP is used, your muscles will start producing ATP through lactic acid fermentation.

Detailed explanation-2: -Although fermentation produces less ATP, it has the advantage of doing so very quickly. It allows your muscles, for example, to get the energy they need for short bursts of intense activity. Aerobic cellular respiration, in contrast, produces ATP more slowly.

Detailed explanation-3: -In muscle cells, fermentation occurs through the lactic acid pathway. During this process, glucose is phosphorylated, broken down and oxidised to make two molecules of pyruvate. The produced pyruvate is then reduced by NADH to make lactic acid. Only two ATP molecules are produced using this pathway.

Detailed explanation-4: -Creatine Phosphate (with oxygen) So all muscle cells contain a high-energy compound called creatine phosphate which is broken down to make more ATP quickly. Creatine phosphate can supply the energy needs of a working muscle at a very high rate, but only for about 8–10 seconds.

Detailed explanation-5: -First all the ATP is stored in the muscle is used up after that the creatine phosphate is used to re-synthesize ATP until there is no more CP. After this process the body will change its energy supply to either aerobic or anaerobic metabolism (energy from glycogen) to produce ATP to fuel exercise.