ANATOMY+PHYSIOLOGY (LOOSELEAF)
4th Edition
ISBN: 9781264265411
Author: McKinley
Publisher: MCG
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Textbook Question
Chapter 15, Problem 1DYKB
A splanchnic nerve in the sympathetic division of the ANS
- a. connects neighboring sympathetic trunk ganglia.
- b. controls parasympathetic functions in the thoracic cavity.
- c. is formed by preganglionic axons that extend to prevertebral ganglia.
- d. travels through parasympathetic pathways in the head.
Expert Solution & Answer
Summary Introduction
Introduction:
The motor component of the ANS (autonomic nervous system) is divided into the sympathetic division and the parasympathetic division. The sympathetic division is complex anatomically then the parasympathetic one. Sympathetic division is also called as the thoracolumbar division.
Answer to Problem 1DYKB
Correct answer:
In the sympathetic division of ANS, a splanchnic nerve is formed by the axons (preganglionic) and which extends till the prevertebral ganglia. Therefore, option c. is correct.
Explanation of Solution
Reason for the correct statement:
Option c. is given as “is formed by preganglionic axons that extend to prevertebral ganglia”. The splanchnic nerves of the sympathetic division run anteriorly from the trunk (sympathetic) to most of the pelvic and abdominal viscera. These nerves (splanchnic) possess the preganglionic axons, which begins from the trunk ganglia and reaches to the aortic wall’s prevertebral ganglia. Hence, the splanchnic nerve is formed by the axons and extends till the prevertebral ganglia.
Hence, option c. is correct.
Reasons for incorrect statements:
Option a. is given as “connects neighboring sympathetic trunk ganglia”. The splanchnic nerve does not connect the neighboring ganglia. Hence, option a. is incorrect.
Option b. is given as “connects parasympathetic functions in the thoracic cavity”. The parasympathetic preganglionic axons are branched in forming the pelvic splanchnic nerves. Hence, option b. is incorrect.
Option d. is given as “travels through parasympathetic pathways in the head”. The sympathetic splanchnic nerve runs from the trunk ganglion (sympathetic) to the prevertebral ganglia. The parasympathetic splanchnic nerves forms the pelvic splanchnic nerves. Hence, option d. is incorrect.
Hence, options a., b., and d. are incorrect.
Conclusion
The splanchnic nerves are formed by those axons, which extends to the prevertebral ganglia. Thus, from the ganglionic origins, these nerves innervate the organs of the body.
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Chapter 15 Solutions
ANATOMY+PHYSIOLOGY (LOOSELEAF)
Ch. 15.1 - What criterion is used to organize the nervous...Ch. 15.1 - Prob. 2WDYLCh. 15.1 - What CNS structure is the integration and command...Ch. 15.2 - Prob. 4WDYLCh. 15.2 - Describe the general anatomic differences in the...Ch. 15.2 - Prob. 6WDYLCh. 15.3 - Which four cranial nerves have a parasympathetic...Ch. 15.3 - What organs are innervated by the pelvic...Ch. 15.4 - Prob. 9WDYLCh. 15.4 - Prob. 10WDYL
Ch. 15.4 - Prob. 11WDYLCh. 15.4 - In what ways does the adrenal medulla pathway help...Ch. 15.5 - Prob. 13WDYLCh. 15.5 - Prob. 14WDYLCh. 15.6 - Prob. 15WDYLCh. 15.6 - Prob. 16WDYLCh. 15.6 - Prob. 17WDYLCh. 15.6 - Prob. 18WDYLCh. 15.6 - Prob. 19WDYLCh. 15.7 - Prob. 20WDYLCh. 15.7 - Prob. 21WDYLCh. 15.7 - Prob. 22WDYLCh. 15.7 - What are the body structures innervated by the...Ch. 15.8 - Prob. 24WDYLCh. 15 - A splanchnic nerve in the sympathetic division of...Ch. 15 - Some parasympathetic preganglionic neuron cell...Ch. 15 - Prob. 3DYKBCh. 15 - Prob. 4DYKBCh. 15 - Sympathetic division preganglionic axons travel to...Ch. 15 - Prob. 6DYKBCh. 15 - Prob. 7DYKBCh. 15 - A sympathetic postganglionic axon is a. long and...Ch. 15 - Prob. 9DYKBCh. 15 - Prob. 10DYKBCh. 15 - Prob. 11DYKBCh. 15 - For the following ganglia, identify the location...Ch. 15 - Prob. 13DYKBCh. 15 - Prob. 14DYKBCh. 15 - Prob. 15DYKBCh. 15 - Prob. 16DYKBCh. 15 - Prob. 17DYKBCh. 15 - What may occur with the mass activation of the...Ch. 15 - Prob. 19DYKBCh. 15 - Prob. 20DYKBCh. 15 - Prob. 1CALCh. 15 - Arlene was in a heightened state of alertness well...Ch. 15 - George has hypertension (high blood pressure). His...Ch. 15 - Prob. 4CALCh. 15 - Prob. 5CALCh. 15 - Prob. 1CSLCh. 15 - When you were younger, your parents may have told...Ch. 15 - Prob. 3CSL
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