Runners only have enough stored atp in their muscle cells to run for about five seconds. which answer correctly explains how the runner’s body adjust to the longer distance, for example, a marathon (42.1 km)? a the runner's body will convert stored fat molecules into energy. b the runner's body will create the needed energy by breaking down proteins. c the runner's body will supply the needed energy by producing starch. d the runner's body will produce the energy by activating the golgi apparatus.

The correct answer is A The runner's body will convert stored fat molecules into energy.

Explanation:

Fats molecules are extra energy which is taken through food that is stored in the body mainly on the liver tissue. These molecules act as the stored form of energy which is used by the body when all other for energy like glucose and glycogen are finished.

Fats stored in the body can provide energy to the body for many days in the case of fasting. Fats contain more energy than protein and carbohydrates. 9 calories are produced from 1 gm of fat molecule which is more than 2 times the energy produced by proteins and carbohydrates.

Therefore to complete a marathon a runner's body will convert stored fat molecule into energy.