Whether short preganglionic fibers, terminal ganglia, collateral ganglia, origin from the thoracolumbar region of the spinal cord, and innervates adrenal medulla are the characteristic feature of sympathetic or parasympathetic nervous system. Introduction: The ANS (autonomic nervous system) is comprised of two units that are the parasympathetic nervous system and SNS (sympathetic nervous system). ANS is involuntary control of the body tissues. The spinal cord comprises 31 pairs of segments and is important because the sympathetic and parasympathetic nerves arise from them.

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Chapter 14.4, Problem 6CYU

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Whether short preganglionic fibers, terminal ganglia, collateral ganglia, origin from the thoracolumbar region of the spinal cord, and innervates adrenal medulla are the characteristic feature of sympathetic or parasympathetic nervous system.

Introduction:

The ANS (autonomic nervous system) is comprised of two units that are the parasympathetic nervous system and SNS (sympathetic nervous system). ANS is involuntary control of the body tissues. The spinal cord comprises 31 pairs of segments and is important because the sympathetic and parasympathetic nerves arise from them.

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Classify the following characteristics to demonstrate your knowledge of differences between the sympathetic and parasympathetic divisions of the autonomic nervous system. Sympathetic Nervous System Most ganglia lie close to the spinal cord and form two chains of ganglia-one on each side of the spinal cord Increases intestinal motility and stimulates intestinal secretion Postganglionic axons are generally short Preganglionic axons are generally short Postganglionic axons release NE that binds to adrenergic receptors located on the effectors Decreases heart rate, contractility, and conduction velocity Ganglia lie within, or very close to, innervated organs Decreases intestinal motility and inhibits intestinal secretion Long preganglionic axons release ACh that binds to nicotinic receptors located within the ganglia Neurons leave the CNS from the thoracic and lumbar regions of the spinal cord Parasympathetic Nervous System Generalized activation is called the fight-or-flight response…

AUTONOMIC NERVOUS SYSTEM STRUCTURE FUNCTION(S)/CHARACTERISTIC(S) SYMPATHETIC DIVISION 1 Preganglionic neuron 2 Postganglionic neuron 3 Gray horns of the spinal cord 4 Dorsal Roots of the spinal cord 5 Ventral Roots of the spinal cord 6 Dorsal Rami 7 Ventral Rami 8 White ramus communicans 9 Gray ramus communicans 10 Sympathetic trunk ganglion (Paravertebral ganglia) 11 Superior cervical ganglion 12 Middle cervical ganglion 13 Inferior cervical ganglion 14 14a 14b 14c Prevertebral ganglia Celiac ganglion Superior mesenteric ganglion Inferior mesenteric ganglion PARASYMPATHETIC DIVISION 15 Preganglionic neuron 16 Postganglionic neuron 17 CN III Oculomotor nerve 18 CN VII Facial nerve…

all of the following apply to the autonomic nervous system except it operates on an involuntary basis it consists of sympathetic and parasympathetic divisions it does not include cranial nerves it is composed of preganglionic and postganglionic neurons