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Sketch a diagram or a flow chart to explain how does the autonomic nervous system exert...

Sketch a diagram or a flow chart to explain how does the autonomic nervous system exert its effects on its target tissue and organs. Give a specific example to illustrate your response.

Science   Anatomy-And-Physiology   
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Answer #1

Sympathetic  nervous system originate from thoracolumbar outflow ( Throacic anf lumbar spinal cord ) and parasympathetic nervous system from cranial nerve 3,7,9,10 and sacral (S2,3,4) spinal cord craniosacral outflow.

Eg : 1)Heart : parasympathetic system have inhibitory action and cause decrease heart rate and decreased conduction .Heart have M2 receptors Acetycholine acts on M2 receptors and exert its action
Sympathetic system - Stimulate the heart by stimulating beta 1 receptor on heart and Neurotransmitter is Adrenaline

Eyes : Parasympathetic system stimulates sphincter pupillae (M3 receptors ) and result in miosis
Sympathetic system stimulates the dilator pupillae through alpa 2 receptor on dilator pupillae and cause mydriasis .

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