KIN 2500 Chapter : ANS Fall 2014
15 Mar 2019
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Comparison of the somatic and autonomic nervous systems. Comparing motor neurons between the sns and ans. In the sns, the neurotransmitter(s) released is/are: acetylcholine (ach) In the ans, the neurotransmitter(s) released is/are: preganglionic axons release ach and postganglionic axons release either ach or norepinephrine (ne) In the sns, there is only one neuron in a pathway; it extends from the cns to the effetor. In the ans, there are two neurons in a pathway. The first of the two ans motor neurons is the preganglionic neuron. Its cell body lies in the brainstem or spinal cord. A preganglionic axon extends from this cell body and exits the cns in either a cranial nerve or spinal nerve. The second ans motor neuron in the pathway is the ganglionic neuron. Its cell body lies within an autonomic ganglion. A postganglionic axon extends from the cell body to the effector.
