Question

messages travel between neurons through

bodily reflexes.

a chemical transmission system.

electrical nerve impulses

the blood stream.

Explanation:

Neurons communicate via neurotransmitters (chemicals) across synapses. Bodily reflexes are responses, not transmission. Electrical impulses are within a neuron. Bloodstream isn't for neuron - neuron messaging. So the correct option is the one about chemical transmission.

Answer:

B. a chemical transmission system.