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Autonomic Nervous System

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The autonomic nervous system is part of nervous system that regulates the body’s unconscious actions. It controls the internal organs of the body, and its in charge of metabolism, cardiovascular activity, temperature regulation, digestion. The autonomic nervous system is divided into sympathetic and parasympathetic nervous system.

Sympathetic Nervous System increase heart rate and metabolic rate. It deals with the response to stress and danger by releasing epinephrine and norepinephrine. The parasympathetic Nervous System oppose and yet compliment the effect of sympathetic nervous system. PNC is central during rest, sleep , and digestion of food. That is it slows metabolic and heart rate.

The SNS receptors are alpha 1, alpha 2, beta 1, …show more content…
In addition, it increases renin secretion, sodium and water reabsorption.
Beta 2 is in the lung and blood vessels. It acts as bronchodilator, peripheral/coronary vasodilator. Furthermore, it increases glucagon secretion, and glucose blood level.

PSN is responsible for flex and digest. PNS receptors are cholinergic receptors. PNS is mainly controlled by vagus nerve. The three major functions of cholinergic are to decrease heart rate, increase secretion( GI secretion, lacrimation and salivation) and increase of acetylcholine at neuromuscular junction.

Adrenal glands are endocrine glands that produce a wide variety of hormones. Adrenal glands sit on top of the kidneys and are divided into two, adrenal medulla and adrenal cortex.
Adrenal medulla secretes catecholamines made up of epinephrine and norepinephrine. Epinephrine and norepinephrine response to stress during flight or fight cause vasoconstriction that is increase in heart rate and blood pressure( epinephrine predominantly increase heart rate), constriction of blood vessels resulting to increased resistance and arterial blood pressure, assists in pulmonary ventilation( dilation of

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