_______ carry nerve impulses between neurons--for example, from sensory neurons to motor neurons.what is in blank?!! and please also explain the...

The correct answer could be 'synapse, as mentioned in post
above, or it could be 'neurotransmitter'.

synapse is the
structure where any branch of one neuron transmits a nerve impulse to a branch of
another neuron, while neurotransmitters is a chemical which actually carries the the
impulses across the synapses. The neurotransmitters actually move from the end of axon,
of one neuron to the dendrite of the next neuron across the synaptic cleft carrying the
message with them.