During sustained physical activity, which hormone is primarily responsible for increasing heart rate and energy availability by stimulating the breakdown of glycogen?

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TheoryPractice · Accepted Answer

Epinephrine. Answer: Epinephrine Epinephrine, also known as adrenaline, is released by the adrenal glands. It increases heart rate and glycogenolysis, delivering more glucose into the bloodstream for energy. Insulin has the opposite effect, promoting glucose storage, whereas dopamine primarily acts as a neurotransmitter with different effects.

During sustained physical activity, which hormone is primarily responsible for increasing heart rate and energy availability by stimulating the breakdown of glycogen?

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