1. A nerve is a group of ______ bundled together.
axons
interneurons
dendrites
glialcells
2. The term neurotransmitter refers to ______
a chemical found in thesynaptic vesicles that is released into the synapse
any one of a number ofchemical compounds that increase the activity of the endocrinesystem
the chemical substancefound in the cell membrane
the DNA contained in thenucleus of every neuron
3. The fluid-filled space between the synaptic knob of one celland the dendrites of the next cell is called the___________.
receptorsite
synapse
synapticknob
axonterminal