HUMAN ANATOMY PKG >CUSTOM<
8th Edition
ISBN: 9781323572528
Author: Marieb
Publisher: Pearson Custom Publishing
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Chapter 12, Problem 26RQ
Summary Introduction
To review:
The relationship between axons and Schwann cells in myelinated versus non-myelinated nerve fibers.
Introduction:
The nerve cell or the neuron is the structural unit of the nervous system as it generates and transfers an electrical impulse from one cell to another and produces communication within the central nervous system and the body segments. The nerve cells are of three types, that is, sensory neurons, motor neurons, as well as interneurons.
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Describe the relationship between axons and Schwann cells in myelinated versus nonmyelinated nerve fibers.
Explain how impulse conduction differs in myelinated and unmyelinated nerve fibers.
Describe the effect of myelination on the speed ofaction potential propagation, as well as other factorsthat affect the speed of action potential conduction.
Chapter 12 Solutions
HUMAN ANATOMY PKG >CUSTOM<
Ch. 12 - In which direction are afferent signals carried?...Ch. 12 - What subdivision of the nervous system regulates...Ch. 12 - What type of sensation is (a) pain from a pulled...Ch. 12 - Which type of neuron process receives stimuli?Ch. 12 - Describe how the electrical impulse from one...Ch. 12 - What is the structural type of most sensory...Ch. 12 - Which structural type of neuron is most abundant?...Ch. 12 - Which neuroglia make myelin in the CNS? In the...Ch. 12 - Which neuroglia are common in regions where...Ch. 12 - Do Schwann cells cover nonmyelinated axons in the...
Ch. 12 - Name the connective tissue wrapping that encloses...Ch. 12 - Where do synaspes occur in the CNS, in white...Ch. 12 - Why is white matter white?Ch. 12 - If there is no interneuron in a reflex arc, as in...Ch. 12 - If you touch a hot stove, you reflexively...Ch. 12 - What type of neuronal circuit contains multiple...Ch. 12 - Both peripheral nerves and the white matter of the...Ch. 12 - From your understanding of the functions of myelin...Ch. 12 - What type of neurons form from neuroblasts in the...Ch. 12 - How does the development of sensory neurons...Ch. 12 - Which of the following structures is not part of...Ch. 12 - Match the names of the cells in column B with the...Ch. 12 - Prob. 3RQCh. 12 - Prob. 4RQCh. 12 - An example of an effector is (a) the eye, (b) a...Ch. 12 - Prob. 6RQCh. 12 - A ganglion is a collection of (a) neuron cell...Ch. 12 - A synapse between a terminal bouton and a neuron...Ch. 12 - Myelin is most like which of the following cell...Ch. 12 - Prob. 10RQCh. 12 - Afferent neurons of the PNS synapse in the CNS...Ch. 12 - Prob. 12RQCh. 12 - Prob. 13RQCh. 12 - Place the connective tissue coverings surrounding...Ch. 12 - Define proprioception.Ch. 12 - Prob. 16RQCh. 12 - Prob. 17RQCh. 12 - Distinguish gray matter from white matter of the...Ch. 12 - What is distinctive about the appearance of a cell...Ch. 12 - Describe the differences between neurons and...Ch. 12 - Distinguish a nerve from a nerve fiber and a...Ch. 12 - Prob. 22RQCh. 12 - Draw a reflex arc in place in the nervous system...Ch. 12 - Prob. 24RQCh. 12 - Why are the cell bodies of sensory neurons located...Ch. 12 - Prob. 26RQCh. 12 - Two anatomists were arguing about a sensory...Ch. 12 - An MRI scan and other diagnostic tests indicated...Ch. 12 - Prob. 3CRCAQCh. 12 - Rochelle developed multiple sclerosis when she was...Ch. 12 - Reflexes can be somatic (as in the knee-jerk...Ch. 12 - Prob. 6CRCAQ
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Define an action potential.arrow_forwardTetrodotoxin is a poison that prevents voltage-gated channels from opening. Would this toxin prevent Graded Potentials and Action Potentials from occurring in an active nerve? Explain why or why not for both types of depolarizations.arrow_forwardDistinguish between saltatory nerve signal conduction in myelinated axons versus unmyelinatedarrow_forward
- Identify and label the following structures on the neuron model figure below: cell body, dendrites, neuron nucleus, neurolemma, axon hillock, nucleus of Schwann cell, Nissl bodies, myelin sheath, axon, node of Ranvier, axon terminals (of neurons synapsing with model neuron), endoneurium (refer to Figure 10.6). 3) 11arrow_forwardDescribe how depolarization occurs along an unmyelinated neuronal axonarrow_forwardахon transmits information away from the cell body (centrifugal) and that ends by the terminal arborization. Only axons are surrounded by a myelin sheath. to the cell body (centripetal) and the axon that PROBI NG Ithe ACTIVITY What are the structural constituents of the gray matter, the white matter, and the nerve? Draw a neuron then use the different documents of the activity to determine, on the figure, t location of each part of the neuron in the nervous system. Using docs a, b, and c, draw and label a transverse section of the spinal cord, a cell body, a transverse section of a nerve.arrow_forward
- state the functions of the following: Neuron Cell body Nissl bodies Dendrites Axon Schwann cell Myelin sheath Neurolemma Node of Ranvierarrow_forwardDistinguish between insulation by oligodendrocyte or Schwann cells. Relate myelination to signal speed. Describe the myelin-related terms: neurilemma, nodes of Ranvier, internodes, nonmyelinatedarrow_forwardDefine myelin sheatharrow_forward
- sometimes the terms neuron and nerve are mistakenly used interchangeably. explain the difference between the two structures.arrow_forwardDescribe the direction of action potential propagation relative to the CNS in the spinal nerves, dorsal roots, and ventral roots. List some of the responses stimulated by the autonomic nervous system in (a) a person who is extremely angry and (b) a person who has just finished eating and is now relaxing.arrow_forwardAssume that two nerves fibers have the same diameter, but one is myelinated and the other is unmyelinated. The conduction of an action potential is most energy-efficient along which type of fiber?arrow_forward
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