Final answer:
The amine hormones are synthesized from the amino acids tryptophan or tyrosine and are derived from the modification of amino acids. Amine hormones include melatonin, epinephrine, and norepinephrine. These hormones do not function as neurotransmitters or paracrines.
Step-by-step explanation:
The amine hormones are synthesized from the amino acids tryptophan or tyrosine. They are derived from the modification of amino acids. Examples of amine hormones include melatonin, which is secreted by the pineal gland and helps regulate circadian rhythm, and the catecholamines, such as epinephrine and norepinephrine, which are secreted by the adrenal medulla and play a role in the fight-or-flight response. These hormones do not function as neurotransmitters or paracrines.