Electrical signals called travel along the plasma membrane of a neuron and stimulate the release of chemicals called that are then used to communicate with other cells

Electrical signals called ions travel along the plasma membrane of a neutron and stimulate the release of chemicals called neurotransmitters that are then used to communicate with other cells. There are many different types of neurotransmitter and these operate with different cell receptors and mechanisms. 

The basic building blocks of dna and rna are nucleotides