synapse 1 2 3 4 5 6 7 Down: 1. the end of the receiving neuron 2. chemical messengers 5. electrical signals Across: 3. the small gap between neurons 4. the junction between neurons 6. the end of the sending neuron 7. membrane-bound spheres filled with neurotransmitter molecules ® Build your own custom worksheet at education.com/worksheet-generator © 2007 - 2020 Education.com