A reaction that actually occurs as several elementary steps . Equations for net reactions often omit intermediates and catalysts . Compare with net ionic equation and molecular equation . A substance which consists of an array of atoms held together by an array of covalent bonds . A crystal of a network covalent solid is actually a single, gigantic molecule.
Neurotransmitters are molecules that are used to carry signals from one neuron to another.
One neuron releases the neurotransmitter near another neuron's receptors. The neurotransmitter diffuses across the gap between the neurons and locks into a receptor site on the surface of the downstream neuron. This induces a change in the downstream neuron. 1. having no net electrical charge. An elementary particle produced by certain nuclear decay processes.