GROSS ANATOMY
AUTONOMIC NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Short preganglionic neuron / Long postganglionic neuron, Ach and NE neurotransmitters
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Long preganglionic neuron / Short postganglionic neuron, NE neurotransmitters
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Either A or B
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None of the above
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Detailed explanation-1: -Sympathetic preganglionic fibers are short because of the close proximity of the ganglia to the vertebral column. Postganglionic sympathetic fibers are long because they must travel from the ganglia all the way to their target organs.
Detailed explanation-2: -Neurotransmitters. Your sympathetic nervous system uses chemicals called neurotransmitters to communicate. Specifically, these chemicals are norepinephrine, epinephrine and acetylcholine.
Detailed explanation-3: -Sympathetic preganglionic fibers tend to be shorter than parasympathetic preganglionic fibers because sympathetic ganglia are often closer to the spinal cord while parasympathetic preganglionic fibers tend to project to and synapse with the postganglionic fiber close to the target organ.
Detailed explanation-4: -Parasympathetic ganglia are located in or near the effector organs giving them long preganglionic fibers and short postganglionic fiber. Sympathetic ganglia are located in the paravertebral chain, thus they have short preganglionic fibers and long postganglionic fibers.