Final answer:
Octopamine is the biogenic amine important for invertebrates as a neurotransmitter, analogous to the role of norepinephrine and epinephrine in vertebrates. so, option 4 is the correct answer.
Step-by-step explanation:
The biogenic amine that is important for invertebrates as a neurotransmitter is octopamine. Octopamine, not as well-known as other biogenic amines like dopamine, norepinephrine, and epinephrine, plays a critical role in the nervous system of invertebrates. While dopamine, norepinephrine, and epinephrine (also known as noradrenaline and adrenaline, respectively) are primarily associated with the adrenergic neurotransmitter system in vertebrates, octopamine is analogous to them in many invertebrate species. Invertebrates utilise octopamine as a neurotransmitter that affects various physiological functions, including locomotion, heart rate, and metabolism.
Octopamine is the biogenic amine that serves as a neurotransmitter in invertebrates.
The biogenic amine that is important for invertebrates as a neurotransmitter is octopamine. Other biogenic amines, such as dopamine, norepinephrine, and epinephrine, are made from tyrosine and have different functions in the nervous system. Octopamine plays a crucial role in the coordination of movement and behavior in invertebrates, including insects and mollusks.