Glycolysis and gluconeogenesis are both pathways the body utilizes for energy production. Although both pathways employ common enzymes, they are not the reverse of one another. They are also not usually used simultaneously. Which pathway(s) is(are) used during intense physical exercise?

Is it

a. glycolysis only,
b. gluconeogenesis, or
c. glycolysis and
d. gluconeogenesis

Gluconeogenesis

Explanation:

Gluconeogenesis is a process which by human body produce energy from other sources apart from carbohydrates like Amino acids from protein or glycerol from fatty acids or lactate.

Gluconeogenesis it takes place during physical exercises. Lactate or amino acids is released into the blood by liver, which convert it to glucose by Gluconeogenesis. The glucose produced is used by the muscle to produce energy.

"a.) well–developed vascular system."

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