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Ch. 14 The Autonomic Nervous System
Hoehn - Marieb Human Anatomy & Physiology, 12th edition
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoHoehn, Haynes, Abbott 12th EditionCh. 14 The Autonomic Nervous SystemProblema 6
Capitolo 14, Problema 6

Where are the cell bodies of visceral sensory neurons?

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Understand that visceral sensory neurons are responsible for transmitting sensory information from the internal organs (viscera) to the central nervous system (CNS).
Recall that sensory neurons have their cell bodies located in specific ganglia outside the CNS, depending on the type of sensory information they carry.
Identify that the cell bodies of visceral sensory neurons are located in the dorsal root ganglia (for spinal nerves) and in the sensory ganglia of certain cranial nerves (such as the nodose ganglion of the vagus nerve).
Recognize that dorsal root ganglia are clusters of sensory neuron cell bodies located just outside the spinal cord, serving as relay points for sensory signals from the body to the CNS.
Summarize that the cell bodies of visceral sensory neurons reside in peripheral ganglia, specifically the dorsal root ganglia and cranial nerve sensory ganglia, rather than within the CNS itself.

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Visceral Sensory Neurons

Visceral sensory neurons transmit sensory information from internal organs to the central nervous system. They detect stimuli such as stretch, chemical changes, and pain within organs like the heart, lungs, and digestive tract.
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Visceral Reflex Arcs

Location of Cell Bodies in Sensory Neurons

The cell bodies of sensory neurons are typically located in ganglia outside the central nervous system. For visceral sensory neurons, these cell bodies reside in specific sensory ganglia associated with cranial and spinal nerves.
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Sensory Receptor Classification by Location

Sensory Ganglia: Dorsal Root and Cranial Nerve Ganglia

Visceral sensory neuron cell bodies are found in dorsal root ganglia for spinal nerves and in cranial nerve ganglia such as the nodose ganglion of the vagus nerve. These ganglia serve as relay points for transmitting visceral sensory signals to the CNS.
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Structure of the Parasympathetic Nervous System
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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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Which ANS fibers release acetylcholine? Which release norepinephrine?

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Describe the anatomical relationship of the white and gray rami communicantes to the spinal nerve, and indicate the kind of fibers found in each ramus type.

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The white rami communicantes contain what kind of fibers?

a. Preganglionic parasympathetic

b. Postganglionic parasympathetic

c. Preganglionic sympathetic

d. Postganglionic sympathetic

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Indicate the results of sympathetic activation of the following structures: sweat glands, eye pupils, adrenal medullae, heart, bronchioles of the lungs, liver, blood vessels of vigorously working skeletal muscles, blood vessels of digestive viscera, salivary glands.

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Briefly explain why the following terms are sometimes used to refer to the autonomic nervous system: involuntary nervous system and emotional-visceral system.

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