After 3 hours of exercise, what are the main sources of energy?

After three hours of exercise, the main sources of energy are the following;

·         Plasma free fatty acids – this is used as an energy in which they provide in every organs in the body of a living organism.

·         Blood glucose – The glucose can provide energy in the body in which they are found in the sugar of the blood.

hi there!

answer: b. nucleolus

explanation: nucleolus is a structure in the nucleus are ribosomes are made.

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