The inner part of the adrenals, derived embryonically from spinal nerve precursors, they secrete epinephrine, norepinephrine and dopamine; used locally as neurotransmitters, sensitive receptors can be mobilized totally by the adrenal medullas.

	Addison's Disease The Condition "...However, the absence of the adrenal medulla and epinephrine does not cause disease..." Adrenaline Related Topic "A hormone secreted by the adrenal medulla that is released into the bloodstream in response to physical or mental stress, as from fear or injury..." Beta Blockers Related Topic "Drugs used to slow the response to epinephrine only (as released hormonally by the adrenal medulla), usually to attempt controlling high blood pressure..." Noradrenaline Related Topic "...A catecholamine hormone secreted from the adrenal medulla and post-ganglionic adrenergic fibers in response to hypotension or emotional stress..." Stress The Condition "...During the alarm stage the organism detects a stressor and responds with activation of the sympathetic nervous system and adrenal medulla, the so-called 'fight or flight reaction' during which the body's defenses are mobilized..."

Last updated: May 10, 2007