Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Chapter 7, Problem 1RA
Summary Introduction
To determine:
Supporting cells that form myelin sheaths.
Introduction:
Supporting cells or neuroglia help in neuron-related functions and are five times abundant than neurons. There are two types of neuroglia or supporting cells in the peripheral nervous system, namely Schwann cells and satellite cells.
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Students have asked these similar questions
Which of the following is/are found only in the PNS?
a. Nerves
b. Astrocytes
c. Myelin
d. Lipofuscin
e. Unmyelinated axons
The axons of myelinated neurons are imbedded in a protective covering of A. Schwann cells B. gray matter. C. nodes of Ranvier D. synaptic knobs.
Which of the following is (are) true about the myelin sheath?
a. made of Schwann cells
b. allow for saltatory conduction
c. insulate the nerve cell
d. all of these
Chapter 7 Solutions
Human Physiology
Ch. 7 - Draw a neuron, label its parts, and describe the...Ch. 7 - Distinguish between sensory neurons, motor...Ch. 7 - Describe the structure of the neurilemma, and...Ch. 7 - Explain how myelin sheaths are formed in the CNS....Ch. 7 - Explain what is meant by the blood-brain barrier....Ch. 7 - Define the terms depolarization and...Ch. 7 - Prob. 4bCPCh. 7 - Describe how gating of Na+andK+ in the axon...Ch. 7 - Prob. 5aCPCh. 7 - Prob. 5bCP
Ch. 7 - Prob. 6aCPCh. 7 - Describe the location of neurotransmitters within...Ch. 7 - Describe the sequence of events by which action...Ch. 7 - Explain how chemically regulated channels differ...Ch. 7 - Prob. 8CPCh. 7 - Prob. 9aCPCh. 7 - Prob. 9bCPCh. 7 - Prob. 10CPCh. 7 - Prob. 11CPCh. 7 - Prob. 12aCPCh. 7 - Prob. 12bCPCh. 7 - Prob. 13aCPCh. 7 - Prob. 13bCPCh. 7 - Prob. 14aCPCh. 7 - Describe the mechanism of action of glycine and...Ch. 7 - Give examples of endogenous opioid polypeptides,...Ch. 7 - Prob. 15bCPCh. 7 - Prob. 16CPCh. 7 - Prob. 17aCPCh. 7 - Prob. 17bCPCh. 7 - Prob. 17cCPCh. 7 - Prob. 1RACh. 7 - Prob. 2RACh. 7 - Prob. 3RACh. 7 - Prob. 4RACh. 7 - Repolarization of an axon during an action...Ch. 7 - As the strength of a depolarizing stimulus to an...Ch. 7 - Prob. 7RACh. 7 - Which of these is not a characteristic of synaptic...Ch. 7 - Prob. 9RACh. 7 - Prob. 10RACh. 7 - Prob. 11RACh. 7 - Prob. 12RACh. 7 - Prob. 13RACh. 7 - Prob. 14RACh. 7 - Prob. 15RACh. 7 - Prob. 16RACh. 7 - Prob. 17RACh. 7 - Which of these may be produced by the action of...Ch. 7 - Prob. 19RACh. 7 - In a step-by-step manner, explain how the...Ch. 7 - Prob. 21RACh. 7 - Prob. 22RACh. 7 - Prob. 23RACh. 7 - Prob. 24RACh. 7 - Once an EPSP is produced in a dendrite, how does...Ch. 7 - Prob. 26RACh. 7 - List the endogenous opioids in the brain and...Ch. 7 - Explain what is meant by long-term potentiation...Ch. 7 - Prob. 29RACh. 7 - Prob. 30RACh. 7 - Prob. 31RACh. 7 - Prob. 32RACh. 7 - Prob. 33RACh. 7 - Explain the nature of the endocannabinoids....Ch. 7 - Prob. 35RACh. 7 - Prob. 36RACh. 7 - Prob. 37RACh. 7 - Prob. 38RACh. 7 - Prob. 39RACh. 7 - Use the figure below (from figure 7.34) to answer...
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- Mark the following statements as true of false. If a statement is false, correct it to make a true statement. a. Ependymal cells regulate the composition and movement of cerebrospinal fluid. b. Schwann cells make myelin in the peripheral nervous system c. Microglia are neuroglial cells with an immune function. d. Oligodendrocytes repair damaged axons in the peripheral nervous system. e. Astrocytes regulate the extracellular environment of the brain and are key components of the blood-brain barrier. f. Oligodendrocytes and Schwann cells perform similar functions in different parts of the nervous system.arrow_forwardOligodendrocytes and Schwann cells generate a fatty substance known as a. glial. c. myelin. b. soma. d. neurilemma.arrow_forwardMatch the types of neuroglia to their functions. (1) ependymal cells (2) oligodendrocytes (3) astrocytes (4) Schwann cells (5) microglial cells A. form a myelin sheath around peripheral nerves B. phagocytize cellular debris and bacteria C. line inner parts of ventricles and spinal cord D. form scar tissue and regulate ion and nutrient concentrations in the CNS E. form a myelin sheath around neurons in the CNSarrow_forward
- Axons found around the area indicated by the arrow in the figure above are myelinated by A. astrocytes B. dorsal root ganglion cells C. microglia D. oligodendrocytes E. Schwann cellsarrow_forwardThe rate of information transmission from the central nervous system (CNS) to an effector organ will be slowed by... A. increasing the diameter of the axons B. increasing the number of nerve cells between the CNS and the effector organ C. adding a myelin sheath to the axons D. increasing the distance between the nodes of Ranvier E. None of the abovearrow_forwardIdentify the following as properties of electrical synapses (ES), chemical synapses (CS), or both (B). a. _____ The plasma membranes of presynaptic and postsynaptic neurons are joined by gap junctions. b. _____ Transmission is unidirectional and delayed. c. _____ A presynaptic neuron and a postsynaptic neuron are involved. d. _____ The use of neurotransmitters packaged into synaptic vesicles is required. e. _____ Transmission is nearly instantaneous and bidirectionarrow_forward
- At an electrical synapse, presynaptic and postsynaptic membranes interface through a. neurofibril nodes. b. gap junctions. c. telodendria. d. neurotransmitters.arrow_forwardThe supporting cells that form myelin sheaths in the peripheral nervous system area. oligodendrocytes b.satellite cells. c.Schwann cells. d.astrocytes. e.microglia.arrow_forward32) In order for a nerve impulse to be transmitted across a synapse, a neurotransmitter must be released froma. an axon terminal.b. a dendrite.c. a soma.d. an axon hillock. 33) What part of a neuron is responsible for receiving information?a. Axon.b. Node of Ranvier. c. Dendrite.d. Myelin sheath.arrow_forward
- . Neurotransmitter substances are stored in vesicles located in specialized portions of thea. neuron cell body. c. dendrite.b. axon. d. postsynaptic membrane.arrow_forwardDamage to the axons in the spinal cord is typically permanent and debilitating. One promising avenue of treatment is transplanting certain cells into the spinal cord after injury. Which cell type is the best choice to help repair a severed axon? O a. Microglia O b. Inhibitory neurons Oc. Astrocytes O d. Schwann cells O e. Excitatory neurons O f. Oligodendrocytesarrow_forward1) Which of the following accurately describes the direction of an impulse moving through a neuron that carries information to the central nervous system (CNS) from the peripheral nervous system (PNS)?a. A sensory (afferent) neuron, impulse moving distally.b. A motor (efferent) neuron, impulse moving proximally.c. A motor (efferent neuron, impulse moving distally.d. A sensory (afferent) neuron, impulse moving proximally. 2) The central nervous system (CNS) is composed ofa. spinal nerves.b. sense receptors.c. the brain and spinal cord.d. nerves of the internal organs.arrow_forward
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