Discussing all the Neurohormones with both their actual functions and etymological definitions

Noradrenaline (norepinephrine) is a neurotransmitter and hormone that plays a role in the body's "fight or flight" response.  Acetylcholine is a neurotransmitter (“brain” +” across” + “to send”) that helps transmit signals in the brain and body. Its name comes from its chemical structure, an acetate group and a choline molecule.  Dopamine is a neurotransmitter that plays a role in motivation, reward, and movement. Its name comes from its chemical structure, a combination of two molecules called dihydroxyphenylalanine and dopamine. Adrenaline (epinephrine) is a hormone and neurotransmitter that helps the body respond to stress. Its name comes from its source, the adrenal glands.  Serotonin is a neurotransmitter that is involved in mood, appetite, and sleep. Its name comes from its chemical structure, a combination of sero- (meaning "serum") and -tonin (meaning "tonic" or "substance that modifies").  Corticotropin-releasing hormone (CRH) is a hormone that stimulates the release of cortisol, a stress hormone. The name comes from its function of stimulating the release of corticotropin, a hormone that stimulates the adrenal glands. Also, it gets its name from its role in stimulating the release of adrenocorticotropic hormone (ACTH) from the pituitary gland, which in turn stimulates the release of cortisol from the adrenal gland. Vasopressin is a hormone that regulates water balance in the body. Its name comes from its ability to constrict blood vessels (vasoconstriction) and increase blood pressure. Vasopressin, also known as antidiuretic hormone (ADH), is so named because it regulates water balance by causing the kidneys to reabsorb water. Thyrotropin-releasing hormone (TRH) is a hormone that stimulates the release of thyroid-stimulating hormone (TSH), which regulates the thyroid gland. Its name comes from its function of stimulating the release of thyrotropin.  Oxytocin is a hormone that is involved in social bonding, childbirth, and lactation. Its name comes from its ability to stimulate uterine contractions (oxytocic) and milk ejection (lactogenic).  Gonadotropin-releasing hormone (GnRH) is a hormone that stimulates the release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which regulate the reproductive system. Its name comes from its function of stimulating the release of gonadotropins.  Growth hormone–releasing hormone (GHRH) is a hormone that stimulates the release of growth hormone (GH), which regulates growth and metabolism. Its name comes from its function of stimulating the release of growth hormone.  Catecholamines are a group of hormones and neurotransmitters that includes adrenaline, noradrenaline, and dopamine. Their name comes from their chemical structure, which includes a catechol group and an amine group.  Histamine is a neurotransmitter and hormone that is involved in inflammation, allergies, and gastric acid secretion. ACTH (adrenocorticotropic hormone) is a hormone that stimulates the release of cortisol from the adrenal glands.  Orexin (hypocretin) is a neurotransmitter that is involved in wakefulness and appetite. Its name comes from its discovery in the hypothalamus and its ability to stimulate food intake (orexigenic).  Glutamic acid (glutamate) is a neurotransmitter that is involved in learning, memory, and neural plasticity. Its name comes from its chemical structure, a combination of glutamine and an acid group.  Galanin is a neuropeptide that is involved in pain perception, mood, and appetite. Its name comes from its discovery in the galanin-containing neurons of the hypothalamus.  Neurotensin comes from the words "neuro," meaning related to nerves, and "tensin," which refers to its ability to cause contraction in smooth muscle. Neurotensin is a neuropeptide that is found in the central nervous system and gastrointestinal tract.