Postganglionic refers to the neurons located after the ganglia of the autonomic nervous system. Some common synonyms for the word postganglionic include terminal nerve fibers, efferent nerve fibers, and effector neurons. Postganglionic fibers carry signals from the ganglia to the target organs, where they regulate different physiological functions such as digestion, cardiac function, and sweating. Another synonym for postganglionic is adrenergic, which refers to the receptors that these neurons activate, such as alpha and beta-adrenergic receptors. Understanding these terms is important in the study of physiology and medicine, as the postganglionic nervous system plays a vital role in maintaining homeostasis in the body.