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Unmasking the ANS: Insights into Our Involuntary Body Controls

Chapter 14, Problem 1

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QUESTION:

All of the following characterize the ANS except

(a) a two-neuron efferent chain

(b) presence of nerve cell bodies in the CNS

(c) presence of nerve cell bodies in the ganglia

(d) innervation of skeletal muscles

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Unmasking the ANS: Insights into Our Involuntary Body Controls
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Unravel the intricacies of the Autonomic Nervous System (ANS) and its pivotal role in controlling involuntary bodily functions. Differentiate between the sympathetic and parasympathetic systems and their unique contributions. Debunk misconceptions surrounding the ANS's characteristics.

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Questions & Answers

QUESTION:

All of the following characterize the ANS except

(a) a two-neuron efferent chain

(b) presence of nerve cell bodies in the CNS

(c) presence of nerve cell bodies in the ganglia

(d) innervation of skeletal muscles

ANSWER:

Step 1 of 2

The autonomic nervous system (ANS) is responsible for regulating involuntary bodily functions and maintaining homeostasis. It consists of two divisions: the sympathetic nervous system and the parasympathetic nervous system. Both divisions of the ANS share certain characteristics, which differentiate them from other components of the nervous system.

(a) A two-neuron efferent chain: The ANS typically involves a two-neuron pathway, where the preganglionic neuron originates in the central nervous system (CNS) and synapses with a postganglionic neuron located in an autonomic ganglion outside the CNS. This two-neuron chain is a defining feature of the ANS.

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