Refer to the illustration. the structure labeled "x" is a

a. neuromodulator molecule
b. receptor protein molecule
c. psychoactive drug molecule
d. neurotransmitter molecule

The appropriate response is neurotransmitter molecule. The molecule discharged from the vesicles are chemicals called neurotransmitters. They float over the synaptic space and tie to extraordinary proteins called receptors on the postsynaptic neuron. The whole procedure rehashes each time an activity potential achieves the axon terminal of the presynaptic neuron.

Step number 4 is least likely to occur meiosis 1