How are messages carried in neurons

The neuron is a nerve cell and is the functional unit of the nervous system that carries the impulse (message) to the appropriate part of the nervous system or interprets the impulse and allows a response. The impulse (or message) is carried through the fibrous extensions of the neuron called dendrites, to the cell body. It passes through the cell body and is carried through the axon to the end brush a collection of fibers that extend off the axon. The impulse then triggers a release of chemicals that allow the impulse to travel through the synapse, the space between the axon of one neuron and the dendrites of the next.

If the experiment was perfomed more then once and you get the same results

Ibelieve is d but i’m not 100% sure