Question

Muscle contractions are fueled by ATP hydrolysis reactions that release 64,000 Joules/mole. How may such reactions are necessary if a human lifts a 1-kg stone 1 meter upward? Assume that human muscles are 20% efficient.

Answer 1

Answer- such reactions are necessary because as stated in the question that only the 20% of the energy is consumed by muscles. To fulfill the requirements of the energy for the muscles the hydrolysis of ATP is necessary otherwise the muscles will not work properly. The human body require energy at a high rate to perform different tasks, various systems operate simultaneously for a single task that is why such reaction are necessary even if there is task as given to lift a 1 kg stone upto 1 metre.