We are the chemical messengers that cross the synaptic gaps between neurons. when released by the sending neuron, we travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing whether that neuron will generate a neural impulse. answer 1 we are natural, opiatelike neurotransmitters linked to pain control and pleasure

explanation:

most inclusive taxonomic category, larger than a kingdom. largest taxonomic group, consisting of closely related phyla. group of closely related species, first part of the scientific name in binomial nomenclature. group of similar organisms that breed and produce fertile offspring.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle