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igor_vitrenko [27]
3 years ago
15

To fuel physical activity, cells may use ATP and creatine phosphate stored in muscle, or they may rely on glycolysis or the TCA

cycle to supply ATP. Which energy system is used, in turn, determines the extent to which each macronutrient (glucose, fatty acids, and/or amino acids) serves as fuel. Fill in the blank about the metabolic processes cells use to fuel physical activity. The primary fuel the body uses during a long event of low intensity (like a 4-hour walk) is __________.
Social Studies
1 answer:
Novosadov [1.4K]3 years ago
5 0

Answer:

The primary fuel the body uses during a long event of low intensity exercise (like a 4-hour walk) is FAT.

Explanation:

The system that intervenes during low intensity exercise is the AEROBIC SYSTEM.

Whenever someone exercises at a low level intensity, the body uses fat as main energy source while sparing the use of blood glucose and muscle glycogen in case the exercise level of intensity increases and while the oxygen availability decreases.

While training for long periods of time, aerobic capacity expands producing an increase in the oxidation of fats.

The maximal aerobic capacity (VO2max) of an individual regulates the contribution of different fuel sources in a proportional way (muscle glycogen, intramuscular triacylclycerols, glucose and fatty acids).

I hope it helps!

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