Autonomic Nervous System

Autonomic Nervous System - XX Autonomic Nervous System 2011...

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Learning Outcomes: Be able to: Describe the anatomy of the sympathetic and parasympathetic nervous system including origin of preganglionic neurons, ganglia, and target organs for postganglionic neurons Describe innervation and function of the adrenal medulla Compare and contrast the autonomic and somatic motor divisions Describe transmitters and receptors for the ANS List parasympathetic effects List sympathetic effects Describe the “fight / flight” response Compare and contrast the parasympathetic and sympathetic nervous systems Characteristics of ANS Visceral motor neurons Target organs: Cardiac muscle Smooth muscle Glands Adipocytes Compare somatic / visceral motor neurons: In ANS, not ONE but rather TWO motor neurons, which synapse in outlying ganglion Preganglionic neuron originates in CNS Postganglionic neuron originates in ganglion Two Divisions of ANS Sympathetic “fight/flight” Parasympathetic “rest/digest” Almost every target organ: Smooth muscle Cardiac muscle Glands Receives dual innervation from both divisions Sympathetic Division (“Thoracolumbar” division) Origin: Preganglionic cell bodies spinal cord segments T1-L2 Most preganglionic axons synapse in sympathetic chain ganglia Some synapse “further out” in collateral ganglia ( which surround aorta) A few go straight to adrenal gland Compared to parasympathetic system, sympathetic system has short
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This note was uploaded on 03/19/2012 for the course BIO 2000 taught by Professor Ewr during the Spring '12 term at Alabama.

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Autonomic Nervous System - XX Autonomic Nervous System 2011...

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