Anatomy & Physiology
5th Edition
ISBN: 9780321861580
Author: Marieb, Elaine N.
Publisher: Pearson College Div
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Chapter 14, Problem 4CYU
Summary Introduction
To review:
Whether short preganglionic fibers, terminal ganglia, collateral ganglia, origin from the thoracolumbar region of the spinal cord, and innervates adrenal medulla are the characteristic feature of sympathetic or parasympathetic nervous system.
Introduction:
The ANS (autonomic nervous system) is comprised of two units that are the parasympathetic nervous system and SNS (sympathetic nervous system). ANS is involuntary control of the body tissues. The spinal cord comprises 31 pairs of segments and is important because the sympathetic and parasympathetic nerves arise from them.
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Classify the following characteristics to demonstrate your knowledge of differences between the sympathetic and parasympathetic
divisions of the autonomic nervous system.
Sympathetic Nervous System
Most ganglia lie close to the
spinal cord and form two chains
of ganglia-one on each side of
the spinal cord
Increases intestinal motility
and stimulates intestinal
secretion
Postganglionic axons are
generally short
Preganglionic axons are
generally short
Postganglionic axons release
NE that binds to adrenergic
receptors located on the
effectors
Decreases heart rate,
contractility, and conduction
velocity
Ganglia lie within, or very
close to, innervated organs
Decreases intestinal motility
and inhibits intestinal
secretion
Long preganglionic axons
release ACh that binds to
nicotinic receptors located within
the ganglia
Neurons leave the CNS from
the thoracic and lumbar
regions of the spinal cord
Parasympathetic Nervous System
Generalized activation is
called the fight-or-flight
response…
AUTONOMIC NERVOUS SYSTEM STRUCTURE
FUNCTION(S)/CHARACTERISTIC(S)
SYMPATHETIC DIVISION
1
Preganglionic neuron
2
Postganglionic neuron
3
Gray horns of the spinal cord
4
Dorsal Roots of the spinal cord
5
Ventral Roots of the spinal cord
6
Dorsal Rami
7
Ventral Rami
8
White ramus communicans
9
Gray ramus communicans
10
Sympathetic trunk ganglion
(Paravertebral ganglia)
11
Superior cervical ganglion
12
Middle cervical ganglion
13
Inferior cervical ganglion
14 14a 14b 14c
Prevertebral ganglia
Celiac ganglion
Superior mesenteric ganglion
Inferior mesenteric ganglion
PARASYMPATHETIC DIVISION
15
Preganglionic neuron
16
Postganglionic neuron
17
CN III Oculomotor nerve
18
CN VII Facial nerve…
Relate each of the following terms or phrases to either the sympathetic (S) or parasympathetic (P) division of the autonomic nervous system:
Chapter 14 Solutions
Anatomy & Physiology
Ch. 14 - Name the three types of effectors of the autonomic...Ch. 14 - Which relays instructions from the CNS to muscles...Ch. 14 - Which branch of the ANS would predominate if you...Ch. 14 - Prob. 4CYUCh. 14 - Prob. 5CYUCh. 14 - Prob. 6CYUCh. 14 - Prob. 7CYUCh. 14 - Prob. 8CYUCh. 14 - Prob. 9CYUCh. 14 - All of the following characterize the ANS except...
Ch. 14 - Relate each of the following terms or phrases to...Ch. 14 - The white rami communicates contain what kind of...Ch. 14 - Collateral sympathetic ganglia are involved with...Ch. 14 - Briefly explain why the following terms are...Ch. 14 - Describe the anatomical relationship of the white...Ch. 14 - Prob. 7RQCh. 14 - Which of the effects listed in response to...Ch. 14 - Which ANS fibers release acetylcholine? Which...Ch. 14 - Describe the meaning and importance of sympathetic...Ch. 14 - List the receptor subtypes for ACh and NE, and...Ch. 14 - Prob. 12RQCh. 14 - Describe the importance of the hypothalamus in...Ch. 14 - Prob. 14RQCh. 14 - Postganglionic neurons are also called ganglionic...Ch. 14 - 10-Year-Old Boy with Spinal Injury On arrival at...Ch. 14 - 10-Year-Old Boy with Spinal Injury On arrival at...Ch. 14 - 10-Year-Old Boy with Spinal Injury On arrival at...Ch. 14 - Prob. 4CCSCh. 14 - 10-Year-Old Boy with Spinal Injury On arrival at...Ch. 14 - Prob. 6CCSCh. 14 - 10-Year-Old Boy with Spinal Injury On arrival at...
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- all of the following apply to the autonomic nervous system except it operates on an involuntary basis it consists of sympathetic and parasympathetic divisions it does not include cranial nerves it is composed of preganglionic and postganglionic neuronsarrow_forwardMatch the following statements about anatomy to the correct division of the autonomic nervous system. Select "Both" if the statement or effect is true of both divisions. Innervate(s) most major organs of the body. Innervate(s) most blood vessels. Most effector pathways involve two neurons. The vagus cranial nerve carries these fibers. ANSWER OPTIONS: Parasympathetic, Sympathetic, BOTHarrow_forwardIn the sympathetic division of the autonomic system: preganglionic neurons originate in the thoracolumbar segments of the cord the preganglionic neurons are unmyelinated the preganglionic neurons are long the neurotransmitter released by the preganglionic neurons is norepinephrinearrow_forward
- In the sympathetic division of the autonomic nervous system: Select one: The ratio between the number of postganglionic and preganglionic neurons is small. A single preganglionic neuron usually synapses with a single postganglionic neuron. An important functional characteristic is convergence of the preganglionic fibers. Preganglionic fibers are usually much longer than the postganglionic fibers. Activity of the neurons tends to have a more generalized and widespread effect on the body.arrow_forwardThe cell bodies of sympathetic preganglionic rHeurons are located in O the dorsal root ganglia the ventral horn small neuronal clusters situated outside of target organs such as the intestines and kidne the intermediolateral cell column of the spinal cordarrow_forwardWhich of the following is NOT a true statement about autonomic nervous system? Parasympathetic cell bodies are located in ganglia within (or near) their target tissues Preganglionic sympathetic neurons release acetylcholine Preganglionic parasympathetic neurons are located in the thoracic and lumbar spinal cord Most postganglionic sympathetic neurons release norepinephrinearrow_forward
- Which of these characterize the parasympathetic division of the autonomic nervous system? Preganglionic fibers are myelinated; postganglionic fibers are not. Preganglionic fibers arise from the thoracic and lumbar regions of the spinal cord. Terminal ganglia are located close to effector organs. Parasympathetic postganglionic fibers secrete acetylcholine.arrow_forwardMatch the following effects and statements to the correct division of the autonomic nervous system. Select "Both" if the statement or effect is true of both divisions. "Resting and digesting" division Innervate most major organs of the body Increases heart rate Constricts pupils Innervates most blood vessels Regulate smooth muscle and cardiac muscle ANSWER OPTIONS: Parasympathetic, Sympathetic, BOTHarrow_forwardWhich of the following is characteristic of parasympathetic ganglia the ganglia are formed of the cell bodies of general somatic efferent neurons O the ganglia are formed of the cell bodies of preganglionic neurons parasympathetic autonomic ganglia are ALL found within the walls of the effector glands or organs synapses between preganglionic and postganglionic neurons are formed within the autonomic gangliaarrow_forward
- Briefly explain why the following terms are sometimes used to refer to the autonomic nervous system: involuntary nervous system and emotional-visceral system.arrow_forwardAUTONOMIC NERVOUS SYSTEM STRUCTURE FUNCTION(S)/CHARACTERISTIC(S) SYMPATHETIC DIVISION Preganglionic neuron Postganglionic neuron Gray horns of the spinal cord Dorsal Roots of the spinal cord Ventral Roots of the spinal cord 1 3 4 6. Dorsal Rami 7 Ventral Rami 8 White ramus communicans Gray ramus communicans Sympathetic trunk ganglion (Ра Superior cervical ganglion Middle cervical ganglion Inferior cervical ganglion Prevertebral ganglia Celiac ganglion Superior mesenteric ganglion Inferior mesenteric ganglion 9. 10 tebral ganglia) 11 12 13 14 14a 14b 14c PARASYMPATHETIC DIVISION 15 Preganglionic neuron Postganglionic neuron CN III Oculomotor nerve CN VII Facial nerve CN IX Glossopharyngeal nerve CN X Vagus nerve Sacral spinal nerves 2-4 Pelvic Splanchnic nerves Terminal ganglia Ciliary ganglion 16 17 18 19 20 21 22 23 23a Pterygopalatine ganglion Submandibular ganglion 23b 23c 23d Otic ganglionarrow_forwardThe cell bodies of autonomic postganglionic neurons are found in ANS ganglia. The cell bodies of another class of neuron are also found in ganglia (but not ANS ganglia). What are these other ganglia called? Determine the structural and functional classification of the neurons found in these other ganglia.arrow_forward
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