LooseLeaf for Human Anatomy
5th Edition
ISBN: 9781259285271
Author: Michael McKinley Dr., Valerie O'Loughlin, Elizabeth Pennefather-O'Brien
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 18, Problem 1WYL
How are motor neurons organizationally different in the ANS versus the SNS?
Expert Solution & Answer
Summary Introduction
To determine:
The difference between the organization of motor neurons in the ANS and the SNS.
Introduction:
The autonomic nervous system (ANS) is also known as autonomic motor or visceral motor system. The somatic nervous system (SNS) includes processes that are controlled consciously.
Explanation of Solution
The differences between the organization of motor neurons in the ANS and SNS are as follows:
| No. | Characteristics | ANS | SNS |
| 1. | Number of motor neuron | A chain of two motor neurons extends from the CNS (central nervous system) to innervate smooth muscle, cardiac muscle, and glands in ANS. | A single motor neuron extends from CNS to skeletal muscle fibers in SNS. |
| 2. | Ganglia associated with motor neurons | Autonomic ganglia, terminal, intramural, and prevertebral ganglia are associated with motor neuron. | None of the ganglia is associated with the motor neurons. |
| 3. | Neurotransmitter released | Preganglionic axons release ACh neurotransmitter and postganglionic axons release either ACh or norepinephrine (NE). | Motor neuron releases acetylcholine (ACh) neurotransmitter from its synaptic knobs. |
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Chapter 18 Solutions
LooseLeaf for Human Anatomy
Ch. 18 - How are motor neurons organizationally different...Ch. 18 - Prob. 2WYLCh. 18 - Prob. 3WYLCh. 18 - Prob. 4WYLCh. 18 - What are the differences between the terminal and...Ch. 18 - Prob. 6WYLCh. 18 - Prob. 7WYLCh. 18 - Prob. 8WYLCh. 18 - Prob. 9WYLCh. 18 - Prob. 10WYL
Ch. 18 - Prob. 11WYLCh. 18 - Prob. 12WYLCh. 18 - Prob. 13WYLCh. 18 - Prob. 14WYLCh. 18 - Prob. 15WYLCh. 18 - Match each numbered item with the most closely...Ch. 18 - A splanchnic nerve in the sympathetic division of...Ch. 18 - Some parasympathetic preganglionic neuron cell...Ch. 18 - Prob. 3MCCh. 18 - Prob. 4MCCh. 18 - Prob. 5MCCh. 18 - Prob. 6MCCh. 18 - Prob. 7MCCh. 18 - Prob. 8MCCh. 18 - Prob. 9MCCh. 18 - All of the following cranial nerves carry...Ch. 18 - Prob. 1CRCh. 18 - Prob. 2CRCh. 18 - Compare and contrast the postganglionic axons of...Ch. 18 - Explain how adrenal medulla stimulation...Ch. 18 - Prob. 5CRCh. 18 - Are the cell bodies of sympathetic and...Ch. 18 - Prob. 7CRCh. 18 - Prob. 8CRCh. 18 - Prob. 9CRCh. 18 - Describe the embryonic components that form ANS...Ch. 18 - Prob. 1DCRCh. 18 - Prob. 2DCR
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