Which pathways would a marathon runner be using for energy at mile 12?
A)Glycolysis, glycogenolysis, glycogenesis
B)Citric acid cycle, $\beta$-oxidation, oxidative phosphorylation
C)Cori cycle, protein synthesis, triglyceride synthesis
D)Generation of ADP, production of lactate, production of pyruvate

Question

Quizplus · Accepted Answer

At mile 12, a marathon runner would be relying primarily on aerobic energy pathways, which include the citric acid cycle, beta-oxidation, and oxidative phosphorylation. These pathways utilize oxygen to produce ATP, providing sustained energy for endurance activities. Glycolysis and other anaerobic pathways would have already been used up by this point and cannot sustain energy production for long periods of time. The Cori cycle, protein synthesis, and triglyceride synthesis are not primary sources of energy production during exercise. The production of lactate and pyruvate are byproducts of glycolysis and would not be the primary energy pathways for a marathon runner at this stage of the race.

Which Pathways Would a Marathon Runner Be Using for Energy β\betaβ

Which Pathways Would a Marathon Runner Be Using for Energy $\beta$