Definition of sympathetic nervous system Sympathetic nervous system
We found 3 definitions of sympathetic nervous system from 3 different sources.
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What does sympathetic nervous system mean?
WordNet
Noun |
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| sympathetic nervous system - originates in the thoracic regions of the spinal cord; opposes physiological effects of the parasympathetic: reduces digestive secretions; speeds the heart; contracts blood vessels | ||
| nervous system, systema nervosum the sensory and control apparatus consisting of a network of nerve cells | ||
| ans, autonomic nervous system the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands | ||
| splanchnic nerve any of several nerves of the sympathetic part of the autonomic nervous system that innervate viscera and blood vessels | ||
| abdominal nerve plexus, coeliac plexus, plexus celiacus, solar plexus a large plexus of sympathetic nerves in the abdomen behind the stomach | ||
| alpha-adrenergic receptor, alpha-adrenoceptor, alpha receptor receptors postulated to exist on nerve cell membranes of the sympathetic nervous system in order to explain the specificity of certain agents that affect only some sympathetic activities (such as vasoconstriction and relaxation of intestinal muscles and contraction of smooth muscles) | ||
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Wiktionary 
- sympathetic nervous system (Noun)
The part of the autonomic nervous system that under stress raises blood pressure and heart rate , constricts blood vessel s and dilates the pupils.
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sympathetic nervous system
A part of the autonomic nervous system responsible for accelerating the heart rate and raising the blood pressure under stress.
