ANATOMY+PHYSIOLOGY
ANATOMY+PHYSIOLOGY
4th Edition
ISBN: 9781260265217
Author: McKinley
Publisher: RENT MCG
bartleby

Videos

Textbook Question
Book Icon
Chapter 15, Problem 1DYKB

A splanchnic nerve in the sympathetic division of the ANS

  1. a. connects neighboring sympathetic trunk ganglia.
  2. b. controls parasympathetic functions in the thoracic cavity.
  3. c. is formed by preganglionic axons that extend to prevertebral ganglia.
  4. d. travels through parasympathetic pathways in the head.
Expert Solution & Answer
Check Mark
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.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
The white ramus communicans containsa. preganglionic sympathetic fibers.b. postganglionic sympathetic fibers.c. preganglionic parasympathetic fibers.d. postganglionic parasympathetic fibers.
The cell bodies of the postganglionic neurons of the sympathetic division are located in thea. sympathetic chain ganglia. d. dorsal root ganglia.b. collateral ganglia. e. Both a and b are correct.c. terminal ganglia
Which of the following statements concerning the preganglionic neuronsof the ANS is true?a. All parasympathetic preganglionic neurons secrete acetylcholine.b. Only parasympathetic preganglionic neurons secrete acetylcholine.c. All sympathetic preganglionic neurons secrete norepinephrine.d. Only sympathetic preganglionic neurons secrete norepinephrine.

Chapter 15 Solutions

ANATOMY+PHYSIOLOGY

Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Essentials of Pharmacology for Health Professions
Nursing
ISBN:9781305441620
Author:WOODROW
Publisher:Cengage
Nervous System - Get to know our nervous system a bit closer, how does it works? | Neurology; Author: FreeMedEducation;https://www.youtube.com/watch?v=6O-0CVAgaEM;License: Standard youtube license