Q20 - Matching Muscle Energy Systems to Exercise Duration and Intensity
Table 1 lists types of metabolic substrate and its concentration as an energy source in human muscle cells. The predicted values of output power produced by the muscle tissue, the expected speed at which the athlete ran with that power, and the duration of exercise are shown when only the respective energy sources were used. CP indicates creatine phosphate. Indicate whether the following descriptions are true or false.
Using the information and data, determine which of the statements are true or which are false.
A. Athletes running a 100-meter sprint are supposed to run using ATP originally stored in muscle cells during the former half. During the last half, ATP produced by respiration is used.
B. It is possible that marathon runners continue exercising using muscle tissue without ATP.
C. A crucial point for middle-distance runners of 1,500 m is switching smoothly from running with CP to that with ATP produced by aerobic breathing.
D. Similar to bird migration, stored fat is one of the major energy sources for long-distance runners, although it has some metabolic delay for conversion into ATP.
Question reproduced from IBO 2020, Theoretical Exam 1, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)