Definition of sympathetic nervous system in English English dictionary
The part of the autonomic nervous system that under stress raises blood pressure and heart rate, constricts blood vessels and dilates the pupils
One of the two divisions of the autonomic nervous system ( the other being the parasympathetic nervous system), consisting of fibers that leave the central nervous system, pass through a chain of ganglia near the spinal cord, and are distributed to heart, lungs, intestine, blood vessels, and sweat glands In general, sympathetic nerves dilate the pupils, constrict peripheral blood vessels, and increase heart rate
a division of the autonomic nervous system; it prepares the body for fight or flight
originates in the thoracic regions of the spinal cord; opposes physiological effects of the parasympathetic: reduces digestive secretions; speeds the heart; contracts blood vessels
Controls the stress response by triggering off hormones which act as messengers to the body to prepare for 'fight or flight '
One of two divisions of the autonomic nervous system that controls many of the involuntary activities of the glands, organs, and other parts of the body
This part of the nervous system regulates involuntary reactions to stress such as increased heart and breathing rates, and other physiological reactions Ever felt an 'adrenalin rush?' That was your sympathetic nervous system at its finest Many asthma drugs, such as albuterol, mimic this system in attempting to relieve an asthma flare
part of the nervous system that operates automatically without conscious choice (such as nerves responsible for blood circulation, digestion, breathing, etc.)
The part of the autonomic nervous system originating in the thoracic and lumbar regions of the spinal cord that in general inhibits or opposes the physiological effects of the parasympathetic nervous system, as in tending to reduce digestive secretions, speeding up the heart, and contracting blood vessels