Anatomy & Physiology (6th Edition)
Anatomy & Physiology (6th Edition)
6th Edition
ISBN: 9780134156415
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Chapter 11, Problem 1MC

Which of the following structures is not part of the central nervous system? (a) the brain, (b) a nerve, (c) the spinal cord, (d) a tract.

Expert Solution & Answer
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Summary Introduction

To determine:

The structure that is not a part of the central nervous system is:

  1. The brain

  2. A nerve

  3. The spinal cord

  4. A tract

Answer to Problem 1MC

Correct answer:

(b) A nerve is not considered as a part of central nervous system.

Explanation of Solution

Explanation for the correct answer:

The nerve consists of one or more bundles of nerve fibers. It transmits the impulses of sensation to the brain. It allows communication between the brain and the body parts. It is not a part of the central nervous system (CNS). It is included in the peripheral nervous system (PNS). Thus option (b) is considered as a correct answer.

Explanation for the incorrect answer:

Option (a) is given as brain is not a part of central nervous system (CNS). This statement is false as central nervous system mainly consists of two parts: the brain and spinal cord. CNS is the main processing center of the body and brain makes the largest part of the CNS. Thus this option is considered as an incorrect answer.

Option (c) is given as spinal cord is not a part of central nervous system (CNS). This statement is false as central nervous system mainly consists of two parts: the brain and spinal cord. Spinal cord mainly performs the function of transmission of nerve signals in the body. Thus this option is considered as an incorrect answer.

Option (d) is given as tract is not a part of central nervous system (CNS). This statement is false as the nerve fibers of central nervous system are organized in bundles called as tracts or fasciculi and assumed as a vital part of CNS. Thus this option is considered as an incorrect answer.

Conclusion

Thus it is concluded that brain, spinal cord and tract are the important part of central nervous system whereas nerves are considered as a part of peripheral nervous system.

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Chapter 11 Solutions

Anatomy & Physiology (6th Edition)

Ch. 11.5 - What determines the size of a graded potential?Ch. 11.6 - Which is bigger, a graded potential or an action...Ch. 11.6 - An action potential does not get smaller as it...Ch. 11.6 - Why does a myelinated axon conduct action...Ch. 11.6 - If an axon receives two stimuli close together in...Ch. 11.7 - Events at a chemical synapse usually involve...Ch. 11.7 - What structure joins two neurons at an electrical...Ch. 11.8 - Which ions flow through chemically gated channels...Ch. 11.8 - Prob. 19CYUCh. 11.9 - Prob. 20CYUCh. 11.9 - Why is cyclic AMP called a second messenger?Ch. 11.10 - Which types of neural circuits would give a...Ch. 11.10 - Prob. 23CYUCh. 11.10 - What pattern of neural processing occurs when we...Ch. 11 - Which of the following structures is not part of...Ch. 11 - Match the names of the supporting cells found in...Ch. 11 - Assume that an EPSP is being generated on the...Ch. 11 - Prob. 3MCCh. 11 - The velocity of nerve impulse conduction is...Ch. 11 - Chemical synapses are characterized by all of the...Ch. 11 - Biogenic amine neurotransmitters include all but...Ch. 11 - Prob. 8MCCh. 11 - Inhibition of acetylcholinesterase by poisoning...Ch. 11 - The anatomical region of a multipolar neuron where...Ch. 11 - An IPSP is inhibitory because (a) it...Ch. 11 - Identify the neuronal circuits described by...Ch. 11 - Explain both the anatomical and functional...Ch. 11 - (a) Describe the composition and function of the...Ch. 11 - (a) What is myelin? (b) How does the myelination...Ch. 11 - (a) Contrast unipolar, bipolar, and multipolar...Ch. 11 - What is the polarized membrane state? How is it...Ch. 11 - Describe the events that must occur to generate an...Ch. 11 - Prob. 19SAQCh. 11 - (a) Explain the difference between an EPSP and an...Ch. 11 - Since at any moment a neuron is likely to have...Ch. 11 - The effects of neurotransmitter binding are very...Ch. 11 - Prob. 23SAQCh. 11 - Prob. 24SAQCh. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...
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