Question

Are any of the energy systems ever shut off?

a) Only the ATP-PCr system
b) Yes, during aerobic exercise
c) No, all energy systems are always active
d) Only the glycolytic system

Answer 1

No, all energy systems are always active.

Step-by-step explanation:

The answer to the question is c) No, all energy systems are always active. The different energy systems in our body, including the ATP-PCr system, glycolytic system, and aerobic respiration, are all continuously active to varying degrees depending on the type and intensity of exercise we are performing. For example, during high-intensity, short-duration activities like sprinting, the ATP-PCr system is the primary energy source. During moderate-intensity activities, the glycolytic system plays a significant role, and during long-duration, endurance exercises, aerobic respiration is the main source of ATP.