Question

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)? (2 points) Select one: 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.

Answer 1

Answer: The correct answer would be option a.

Explanation:

There are three main energy systems in human body.

1. ATP-CP: ATP-creatine phosphate system is used for initial 4-5 seconds.

2. Anaerobic: During high intensity short duration activity this system is used in which glycolysis and fermentation helps in production of energy.

3. Aerobic: It is active during long duration low intensity exercises such as marathon. In this system, glycolysis, utilization of all stored glycogen, and lipolysis take place.

Once most of the glycogen stores are depleted body starts breaking down stored fats for energy production.

Thus, the correct answer would be option a.

Answer 2

The answer is option A