We can confirm that the adrenal medulla's hormonal secretion consists of primarily epinephrine.
<h3>What is Epinephrine?</h3>
As stated in the question, eighty percent of the adrenal medulla's hormonal secretion is epinephrine, which affects receptors in the cardiovascular and respiratory systems, gastrointestinal tract, liver, and other endocrine glands. Its main functions are to affect heart rate and blood sugar levels. It is also known as adrenaline.
Therefore, we can confirm that the adrenal medulla's hormonal secretion consists of primarily epinephrine, better known as adrenaline.
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