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Learn about the sympathetic nervous system, a network of nerves that controls your "fight-or-flight" response. Find out how it works, where it is located, what conditions can affect it and how to keep it healthy.
Learn about the anatomy and function of the sympathetic nervous system, one of the two divisions of the autonomic nervous system. The sympathetic nervous system prepares the body for "fight or flight" by stimulating the eyes, skin, cardiovascular, endocrine and respiratory systems.
Sympathetic nervous system stimulation causes vasoconstriction of most blood vessels, including many of those in the skin, the digestive tract, and the kidneys. This occurs as a result of activation of alpha-1 adrenergic receptors by norepinephrine released by post-ganglionic sympathetic neurons.
Learn how the sympathetic nervous system (SNS) regulates autonomic processes and prepares the body for stress-related activities. Find out the functions, neurotransmitters, and problems of the SNS and its role in the fight-or-flight response.
The sympathetic nervous system (SNS) is responsible for the body's stress response and is activated when you perceive danger. It involves the brain, the spinal cord, and the release of hormones such as adrenaline (epinephrine) that prepare the body for fight, flight, freeze, or fawn reactions.
In the heart (beta-1, beta-2), sympathetic activation causes an increased heart rate, the force of contraction, and rate of conduction, allowing for increased cardiac output to supply the body with oxygenated blood.
Learn about the sympathetic nervous system, part of the autonomic nervous system that controls involuntary actions of muscles, glands and internal organs. Find out how it works, where it is located, and what are its roles in the fight-or-flight response and clinical conditions.
The sympathetic nervous system is a division of the autonomic nervous system that produces localized and reflex adjustments of the body in response to stress. It is part of the fight-or-flight response that involves the release of epinephrine, heart rate, blood pressure, and other changes.
The sympathetic nervous system is part of the autonomic nervous system that controls the body's involuntary responses to stress, such as fight-or-flight. Learn about its structure, functions, and how it regulates body temperature, cardiovascular effects, and endocrine responses.
Learn about the sympathetic nervous system, a part of the autonomic nervous system that controls vital organs and functions through rapid regulation. Find chapters and articles on topics such as sympathetic control of the heart, stress, insulin resistance, and pain.