Neurotransmitters are designated as the body's biological messengers. They are the molecules utilized by the nervous system to communicate messages between neurons, or from neurons to muscles. A neurotransmitter impacts a neuron in one of three ways, including excitatory, inhibitory, or modulatory. It transports, enhances, and balances signals between neurons, nerve, and other cells in the body.
These chemical messengers can affect a wide variety of both physical and phycological functions, including heart rate, sleep, appetite, mood, and fear. Endorphins are neuropeptides that are imperative to the body. One of their primary functions is to help the body handle pain. They are substances formed in the brain and the pituitary gland, which reduce painful sensations by binding to receptors in the nervous system.