PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Spinal cord and by short postganglionic fibers
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Organs and by short postganglionic fibers
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Organs and by long postganglionic fibers
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Spinal cord and by long postganglionic fibers
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Detailed explanation-1: -The parasympathetic nervous system is characterized by peripheral ganglia usually near the? Answer: Organs and short post ganglionic fibers. This is correct. The parasympathetic ganglia are near the organs and they have short postganglionic fibers.
Detailed explanation-2: -The postganglionic fibers that arise from the parasympathetic effector neurons are very short, and they are restricted to the visceral organs. Unlike the sympathetic nerves, parasympathetic fibers do not travel in spinal nerves to innervate other peripheral tissues.
Detailed explanation-3: -The correct answer is (c): short postganglionic axons near the organs they innervate. Both the sympathetic and the parasympathetic branches of the ANS contain a two-neuron chain, a preganglionic and a postganglionic neuron, to carry the message from the central nervous system to the target tissue.