LooseLeaf for Human Anatomy
5th Edition
ISBN: 9781259285271
Author: Michael McKinley Dr., Valerie O'Loughlin, Elizabeth Pennefather-O'Brien
Publisher: McGraw-Hill Education
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Chapter 16, Problem 2MC
Summary Introduction
Introduction:
Spinal nerve roots are the nerve fiber bundles that emerge from the spinal cord. There are 31 different nerve pairs that emerge from the spinal cord, and there are two different spinal roots, namely the posterior root and anterior root. Posterior root travels from the spinal cord to the dorsal root ganglion.
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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
Select the statement that best describes the local circuitry of the spinal cord.
a. There is no local circuitry within the spinal cord.
b. Local circuits enable the same neurons to innervate both distal and proximal muscles.
c. Neurons that innervate distal muscles are interconnected across the midline.
d. None of the answers.
e. Neurons that innervate proximal muscles are interconnected through many spiral cord segments.
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.
Chapter 16 Solutions
LooseLeaf for Human Anatomy
Ch. 16 - Prob. 1WYLCh. 16 - Prob. 2WYLCh. 16 - What is the function of the denticulate ligaments?Ch. 16 - Prob. 4WYLCh. 16 - Prob. 5WYLCh. 16 - Prob. 6WYLCh. 16 - Prob. 7WYLCh. 16 - Prob. 8WYLCh. 16 - Prob. 9WYLCh. 16 - Prob. 10WYL
Ch. 16 - Prob. 11WYLCh. 16 - Prob. 12WYLCh. 16 - Prob. 13WYLCh. 16 - Prob. 14WYLCh. 16 - Match each numbered item with the most closely...Ch. 16 - Prob. 1MCCh. 16 - Prob. 2MCCh. 16 - Identify the meningeal layer immediately deep to...Ch. 16 - Axons cross from one side of the spinal cord to...Ch. 16 - The radial nerve originates from the ______...Ch. 16 - Prob. 6MCCh. 16 - Prob. 7MCCh. 16 - Prob. 8MCCh. 16 - Prob. 9MCCh. 16 - Which statement is true about intercostal nerves?...Ch. 16 - Prob. 1CRCh. 16 - Where is the epidural space? What is housed there?Ch. 16 - Prob. 3CRCh. 16 - Where are the cervical plexuses located, and what...Ch. 16 - Prob. 5CRCh. 16 - Prob. 6CRCh. 16 - What muscles do the tibial and common fibular...Ch. 16 - Prob. 8CRCh. 16 - What are the differences between withdrawal,...Ch. 16 - Where are the basal plates of the neural tube, and...Ch. 16 - Prob. 1DCRCh. 16 - Prob. 2DCR
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- 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.arrow_forwardsurrounds a bundle of nerve fibers A. Neurium B. Perineurium C. Epineurium D. Endoneurium E. None of the abovearrow_forwardA typical spinal nerve: Select one: is protected by the dura, arachnoid and pia mater b. normally divides into four branches that will supply the thoracic region, the abdominal region, the pelvic region and the limbs C. contains one nerve fibre and it's myelin sheath d. is covered by the connective tissue called endomysium e. attaches to the spinal cord via the dorsal and ventral roots O a.arrow_forward
- A typical spinal nerve: Select one: a. normally divides into four branches that will supply the thoracic region, the abdominal region, the pelvic region and the limbs b. is covered by the connective tissue called epineurium c. attaches to the spinal cord via the dorsal root ganglia d. is protected by the dura, arachnoid and pia mater e. contains one nerve fibre and it's myelin sheatharrow_forwardDescribe the spinal cord according to: A. location B. shape and length C. vertebral levels of upper and lower extremities D. distribution of gray and white matter E. anatomical enlargements F. features at distal end G. attachment of spinal nervesarrow_forwardThe white matter of the spinal cord is composed primarily ofa. unmyelinated axons.b. neurolemmocytes and satellite cells.c. myelinated axons.d. cell bodies of neuronsarrow_forward
- Damage to the surface tissue of the spinal cord will most likely affecta. information processing within the spinal cord.b. the stimulation of sensory organs.c. communication between the peripheral nervous system and the brain.d. reflex arcs.arrow_forwardThe thoracic spinal cord has the smallest dorsal horn area because: a. the trunk is the most innervated area of the body and therefore there are more projections into the dorsal horn there. b. the trunk is the least innervated area of the body and therefore there are fewer projections into the dorsal horn there. c. most of the descending upper motor neurons have already entered the ventral horn. d. There are many motor neurons to control the small muscles around the spine.arrow_forwardWhat kinds of neurons (sympathetic or parasympathetic, preganglionic or postganglionic) are found in the following? a. cranial nerve nuclei b. lateral horn of the thoracic spinal cord gray matter c. lateral portion of the sacral spinal cord gray matter d. chain ganglia e. ganglia in the wall of an organarrow_forward
- The outermost connective tissue wrapping of a nerve is called thea. epineurium.b. perineurium.c. endoneurium.d. arachnoid mater.e. dura mater.arrow_forwardA collection of spinal nerves that join together after leaving the spinalcord is called aa. ganglion. c. projection nerve.b. nucleus. d. plexus.arrow_forwardWhich of the following statements regarding sciatic nerve is correct? a. Arises from L3/4/5/S1/2 b. Emerges from the lower border of piriformis c. Most commonly divides onto common peroneal and tibial branches in the middle of the hamstring compartment d. Can be injured by intramuscular injections in the upper outer quadrant of the buttock e. Gives no branches in the gluteal compartmentarrow_forward
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