KIN 2500 Chapter : Autonomic Nervous System Answer Key Fall 2014
15 Mar 2019
School
Course
Professor
Document Summary
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 effector. 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. Summary: preganglionic neuron (in the brain stem) preganglionic.
