Explanation Explanation/justification for the correct answer : Option (b) sensory neurons. The posterior root is called so because it emerges from the posterior part of the spinal cord. It contains sensory neurons, specifically the axon part. It carries information from various parts of the body to brain So, the correct answer is option (b). Explanation for incorrect answer : Option (a) interneurons. They are present in dorsal horn which is a part of gray matter. It is present in the center of the spinal cord...

Laboratory Manual For Human Anatomy & Physiology

4th Edition

ISBN: 9781260159363

Author: Martin, Terry R., Prentice-craver, Cynthia

Publisher: McGraw-Hill Publishing Co.

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Question

Chapter 28, Problem 3PL

Summary Introduction

Introduction:

Spinal cord gives rise to two roots of spinal nerve: posterior or dorsal root and the anterior or ventral root. The two roots merge to form the spinal nerve. The spinal nerve carries sensory and motor signals between the spinal cord and the body.

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Chapter 28, Problem 2PL

Chapter 28, Problem 4PL

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Which of the following does not describe the spinal nerves? A.They are created through a combination of dorsal and ventral roots. B. They exit the vertebral column through intervertebral spaces. C. Some are made up of only sensory fibers, while others are made up of motor fibers. D. There are thirty-one spinal nerves. They are named based on where they exit the vertebral column.

Which of the following describes the ascending tracts and the descending tracts of the spinal cord? A. The ascending tracts contain motor impulses, and the descending tracts contain sensory information.B. Both the ascending and descending tracts contain sensory information.C. The ascending tracts contain sensory information, and the descending tracts contain the motor impulses.D. Both the ascending and descending tracts contain motor impulses.

Mark the following statements about the spinal cord as true or false. If a statement is false, correct it to make a true statement.a. The spinal cord functions as a relay and processing station.b. The spinal cord extends from the foramen magnum to the level between the first and second lumbar vertebrae.c. The epidural space around the spinal cord is only a potential space.d. The posterior horn of spinal gray matter contains the cell bodies of motor neurons.e. The corticospinal tracts are the main sensory tracts in the spinal cord

Chapter 28 Solutions

Laboratory Manual For Human Anatomy & Physiology

Ch. 28 - The ____________ is the most superficial membrane...Ch. 28 - The inferior end of the adult spinal cord...Ch. 28 - Prob. 3PL Ch. 28 - Which of the following is not part of the gray...Ch. 28 - The central canal of the spinal cord is located...Ch. 28 - The brachial plexus is formed from components of...Ch. 28 - There are eight pairs of cervical spinal nerves....Ch. 28 - The major ascending (sensory) and descending...Ch. 28 - Match the terms in column A with the descriptions...Ch. 28 - Prob. F28.14A

Ch. 28 - The spinal cord gives rise to 31 pairs...Ch. 28 - The bulge in the spinal cord that gives off nerves...Ch. 28 - The bulge in the spinal cord that gives off nerves...Ch. 28 - The ______________ is a groove that extends the...Ch. 28 - In a spinal cord cross section, the posterior...Ch. 28 - The axons of motor neurons are found in the...Ch. 28 - The _______________ connects the gray matter on...Ch. 28 - The _______ in the gray commissure of the spinal...Ch. 28 - The white matter of the spinal cord is divided...Ch. 28 - There are ______________________ pairs of cervical...Ch. 28 - There are ______________________ pairs of sacral...Ch. 28 - Cervical spinal nerve pair C1 originates between...Ch. 28 - Spinal nerves L4 through S4 form a...Ch. 28 - The gray matter of the spinal cord is divided into...Ch. 28 - The spinal cord ends just inferior to L1 in a...Ch. 28 - Severing the ______________________ nerves of the...Ch. 28 - The inferior and superior gluteal nerves of the...Ch. 28 - To block chronic pain in a patient, sometimes...Ch. 28 - Prob. 4.2A Ch. 28 - Injuries to the vertebral column and spinal cord...Ch. 28 - Why are intramuscular injections given in the...Ch. 28 - Prob. 4.2CT

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Spinal cord gives rise to two roots of spinal nerve: posterior or dorsal root and the anterior or ventral root. The two roots merge to form the spinal nerve. The spinal nerve carries sensory and motor signals between the spinal cord and the body.

Solution Summary: The author explains that spinal cord gives rise to two roots of spinal nerve: posterior or dorsal root and anterior or ventral root. The posterior root contains sensory neurons and motor neurons.

Concept explainers

Introduction: Spinal cord gives rise to two roots of spinal nerve: posterior or dorsal root and the anterior or ventral root. The two roots merge to form the spinal nerve. The spinal nerve carries sensory and motor signals between the spinal cord and the body.

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Chapter 28 Solutions

Introduction:

Spinal cord gives rise to two roots of spinal nerve: posterior or dorsal root and the anterior or ventral root. The two roots merge to form the spinal nerve. The spinal nerve carries sensory and motor signals between the spinal cord and the body.