Neurohormones are chemical messenger molecules that are released by neurons, but enter the bloodstream where they travel to distant target sites within the body. Therefore, neurohormones share characteristics with both neurotransmitters and hormones. Similar to neurotransmitters, neurohormones are released by neurons. Similar to hormones, neurohormones travel in the bloodstream.

Two well-known examples of neurohormones are oxytocin and the antidiuretic hormone (also referred to as vasopressin).

Hormone
Neurotransmitter

Glial cell found within the posterior pituitary gland. It resembles astrocytes and functions to provide support to unmyelinated axons whose terminals release oxytocin and vasopressin.