Videos
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.
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.
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?
Chapter 15 Solutions
Anatomy & Physiology: An Integrative Approach
Additional Science Textbook Solutions
Genetics: From Genes to Genomes
Biology Illinois Edition (Glencoe Science)
Brock Biology of Microorganisms (15th Edition)
Brock Biology of Microorganisms (14th Edition)
Principles of Anatomy and Physiology
- Parasympathetic ganglia are located a. in a chain parallel to the spinal cord. b. in the dorsal roots of spinal nerves. c. next to or within the organs innervated. d. in the brain.arrow_forwardWhich of the following is not associated with sympathetic stimulation? a. arteriolar dilation in skeletal muscle b. flight or fight c. preparation for energy expenditure d. diffuse effects e. small intestine absorption of nutrients.arrow_forwardParavertebral and prevertebral ganglia are part of the parasympathetic branch of the ANS. A. True B. Falsearrow_forward
- The ganglia of the _ division are closer to the spine than the ganglia of the _ division a. Sympathetic, Parasympathetic b. Parasympathetic, Peripheral c. Sympathetic, Peripheral d. Parasympathetic, Sympatheticarrow_forwardThe postganglionic fibers of the sympathetic nervous system are: a. short, adrenergic, type B b. short, cholernergic, type B c. long, adrenergic, type A d. long, cholernergic, type A e. none of the abovearrow_forwardWhich of the following is an effector site for an ANS axon? a. Quadriceps femoris b. Diaphragm c. extrinsic eye muscles d. small intestine d. All of these except the quadriceps femorisarrow_forward
- a. The nerves connecting the ganglia make up the ______________. b. What is the lowest of the chain ganglia? c. Each sympathetic chain extends from the ___________ to the ____________.arrow_forwardWhich of the following is a feature exclusively of the sympathetic division of the ANS? Select one: O a. Postganglionic axons tend to be localized to a single effector O b. Most preganglionic axons are short O. None of these options is a feature of the sympathetic system O d. Preganglionic neurons extend from the brain stem or sacral elements of the spinal cordarrow_forwardWhich of the following is correct regarding the autonomic nervoussystem?a. It uses both cranial and spinal nerves.b. It is divided into sympathetic and parasympathetic divisions.c. Most organs under ANS control are under dual innervation—thatis, by both sympathetic and parasympathetic divisions.d. Major responsibilities are regulation and repair of cardiacmuscle, smooth muscle, organs, and glands.e. All of these are correct.arrow_forward
- Sympathetic nerve stimulation does not causea. the liver to release glycogen.b. the dilation of bronchioles.c. the gastrointestinal tract to digest food.d. an increase in the heart rate.arrow_forwardWhich of the following cranial nerves carries sympathetic fibers? a. oculomotor b. facial c. trigeminal d. vagus e. none of the cranial nervesarrow_forwardThe fibers of the sympathetic division may release Ach at the: Select one: a. Synapse with the cardiac muscle b. Synapse with the postganglionic neuron c. Neuromuscular junction d. Synapse with the adrenal cortexarrow_forward
Essentials of Pharmacology for Health ProfessionsNursingISBN:9781305441620Author:WOODROWPublisher:Cengage