When a rabbit runs away from a fox its muscles need?

When a rabbit runs away from a fox, its muscles require a significant amount of energy to power rapid movement. This energy is derived from the breakdown of glucose through cellular respiration, which results in the production of ATP (adenosine triphosphate). Additionally, the rabbit's muscles may rely on anaerobic respiration for quick bursts of speed, leading to the accumulation of lactic acid. Overall, the demand for oxygen and energy increases dramatically during this escape response.