Textbook Question
Collateral sympathetic ganglia are involved with innervating
a. abdominal organs
b. thoracic organs
c. head
d. arrector pili
e. all of these
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Ch. 14 The Autonomic Nervous System
Marieb, Hoehn7th EditionHuman Anatomy & PhysiologyISBN: 9780805359091
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Table of contents
- Ch. 1 The Human Body: An Orientation24
- Ch. 2 Chemistry Comes Alive25
- Ch. 3 Cells: The Living Units24
- Ch. 4 Tissue: The Living Fabric19
- Ch. 5 The Integumentary System10
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton11
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System26
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue23
- Ch. 12 The Central Nervous System26
- Ch. 13 The Peripheral Nervous System and Reflex Activity28
- Ch. 14 The Autonomic Nervous System18
- Ch. 16 The Endocrine System26
- Ch. 17 Blood27
- Ch. 18 The Cardiovascular System: The Heart22
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues16
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses29
- Ch. 22 The Respiratory System20
- Ch. 23 The Digestive System30
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System25
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System23
Marieb, Hoehn7th EditionHuman Anatomy & PhysiologyISBN: 9780805359091Not the one you use?Change textbook
Chapter 14, Problem 3
The white rami communicantes contain what kind of fibers?
a. Preganglionic parasympathetic
b. Postganglionic parasympathetic
c. Preganglionic sympathetic
d. Postganglionic sympathetic
Verified step by step guidance1
Step 1: Understand the role of rami communicantes in the autonomic nervous system. They are nerve fibers that connect the spinal nerves to the sympathetic trunk (chain ganglia).
Step 2: Recall that there are two types of rami communicantes: white rami communicantes and gray rami communicantes. Each carries different types of fibers.
Step 3: Know that white rami communicantes carry myelinated preganglionic sympathetic fibers from the spinal cord to the sympathetic ganglia. These fibers are responsible for transmitting signals from the central nervous system to the sympathetic ganglia.
Step 4: Contrast this with gray rami communicantes, which carry unmyelinated postganglionic sympathetic fibers from the sympathetic ganglia back to the spinal nerves to reach target organs.
Step 5: Based on this understanding, identify that the white rami communicantes contain preganglionic sympathetic fibers.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
White Rami Communicantes
White rami communicantes are nerve fibers that connect the spinal nerves to the sympathetic trunk. They carry myelinated preganglionic sympathetic fibers from the spinal cord to the sympathetic ganglia, enabling the transmission of signals in the sympathetic nervous system.
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White & Gray Matter
Preganglionic vs. Postganglionic Fibers
Preganglionic fibers originate in the central nervous system and synapse in autonomic ganglia, while postganglionic fibers extend from these ganglia to target organs. Preganglionic fibers are typically myelinated, allowing faster signal conduction.
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Sympathetic vs. Parasympathetic Fibers
The autonomic nervous system has two divisions: sympathetic and parasympathetic. Sympathetic fibers prepare the body for 'fight or flight' responses, while parasympathetic fibers support 'rest and digest' functions. White rami communicantes specifically carry sympathetic fibers.
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Related Practice
Textbook Question
Which ANS fibers release acetylcholine? Which release norepinephrine?
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Textbook Question
All of the following characterize the ANS except
a. A two-neuron efferent chain
b. Presence of neuron cell bodies in the CNS
c. Presence of neuron cell bodies in the ganglia
d. Innervation of skeletal muscles
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Textbook Question
Relate each of the following terms or phrases to either the sympathetic (S) or parasympathetic (P) division of the autonomic nervous system:
______ (7) Generally short-duration action
______ (8) Increases heart rate and blood pressure
______ (9) Increases gastric motility and secretion of lacrimal, salivary, and digestive juices
______ (10) Innervates blood vessels
______ (11) Most active when you are relaxing in a hammock
______ (12) Active when you are running in the Boston Marathon
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Textbook Question
Where are the cell bodies of visceral sensory neurons?
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Textbook Question
Relate each of the following terms or phrases to either the sympathetic (S) or parasympathetic (P) division of the autonomic nervous system:
______ (1) Short preganglionic, long postganglionic fibers
______ (2) Intramural ganglia
______ (3) Craniosacral part
______ (4) Adrenergic fibers
______ (5) Cervical ganglia
______ (6) Otic and ciliary ganglia
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