Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 42, Problem 5U
White matter is ______, and gray matter is ________.
a. comprised of axons; comprised of cell bodies and dendrites
b. myelinated; unmyelinated
c. found in the CNS; also found in the CNS
d. All of the choices are correct.
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Gray matter contains primarilya. myelinated fibers. c. Schwann cells.b. neuron cell bodies. d. oligodendrocytes
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 found only in the PNS?
a. Nerves
b. Astrocytes
c. Myelin
d. Lipofuscin
e. Unmyelinated axons
Chapter 42 Solutions
Biology
Ch. 42.1 - Differentiate between subdivisions of the...Ch. 42.1 - Prob. 2LOCh. 42.1 - Explain the roles of the different nervous system...Ch. 42.2 - Contrast the relative concentrations of important...Ch. 42.2 - Prob. 2LOCh. 42.2 - Prob. 3LOCh. 42.3 - Prob. 1LOCh. 42.3 - Prob. 2LOCh. 42.3 - Prob. 3LOCh. 42.4 - Prob. 1LO
Ch. 42.4 - Prob. 2LOCh. 42.4 - Prob. 3LOCh. 42.5 - Describe the organization of the peripheral...Ch. 42.5 - Prob. 2LOCh. 42.5 - Prob. 3LOCh. 42.5 - Prob. 4LOCh. 42 - Data analysis Draw the resulting potentials for...Ch. 42 - Prob. 2DACh. 42 - Which of the following best describes the...Ch. 42 - The ____ cannot be controlled by conscious...Ch. 42 - Prob. 3UCh. 42 - Inhibitory neurotransmitters a. hyperpolarize...Ch. 42 - White matter is ______, and gray matter is...Ch. 42 - During an action potential a. the rising phase is...Ch. 42 - Prob. 7UCh. 42 - Imagine that you are doing an experiment on the...Ch. 42 - The Na+/K+ ATPase pump is a. not required for...Ch. 42 - Prob. 3ACh. 42 - The following is a list of the components of a...Ch. 42 - Prob. 5ACh. 42 - As you sit quietly reading this sentence, the part...Ch. 42 - G proteincoupled receptors are involved in the...Ch. 42 - Tetraethylammonium (TEA) is a drug that blocks...Ch. 42 - Describe the status of the Na+ and K+ channels at...Ch. 42 - Describe the steps required to produce an...Ch. 42 - Prob. 4S
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- A neuron that carries information from the brain to a skeletal muscle is part of the _____. A. parasympathetic divisionB. somatic nervous systemC. autonomic nervous systemD.arrow_forwardMark 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_forwardWhich of the following is not a part of the periphrial nervous system (PNS)? a.somatic nervous system b.autonomic nervous system c.sensory neurons d. motor neurons e. spinal cordarrow_forward
- a. gray matter b. white matter c. myelinated fibers d. unmyelinated fibers e. nodes of Ranvier Match the description to the appropriate term. a. gray matter b. white matter c. myelinated fibers d. unmyelinated fibers e. nodes of Ranvier ____ 1. Contains myelinated fibers ____ 2. Contains neuron cell bodies and unmyelinated fibers ____ 3. Axons that are white in color and conduct nerve impulses faster ____ 4. Axons that are gray in color ____ 5. Gaps in the myelin sheatharrow_forwardYou experience a quick, sharp pain in your foot. That sensory information traveled through _________ connections up the ____________ pathway of the spinal cord. a. Myelinated; Spinothalamic b. Myelinated; DCML c. Unmyelinated; Spinothalamic d. Unmyelinated; DCMLarrow_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_forward
- The fatty substance that helps protect the axon is calleda. neurotransmitter.b. myelin.c. dendrite.d. nodes of Ranvier.arrow_forwardAxons 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 darker area that surrounds the outer most part or “bark” of the brain is made up of mostly___. A. Unmylinated axons B. Mylinated axons C. Glial cell bodies D. Even combination of mylinated axons and cell bodies E. Nueron cell bodiesarrow_forward
- 30) What is true about gray matter and white matter? a. White matter can be found in the outer layer of the brain.b. White matter looks white because it is made up of myelinated axons.c. Gray matter looks gray because it is made up of myelinated axons.d. Gray matter can be found in the outer layer of the spinal cord. 31) The diencephalon includes thea. thalamus and hyPothalamus.b. pons and medulla. c. cerebral cortex and cerebellum. d. parietal and occipital lobes.arrow_forwardare found primarily in the Grey matter A. unmyelinated axons B. neuron cell bodies C. Interneurons D. Capillary blood vessels E. axon terminals F. dendrites G. synapses H. glial cells I All of the above J. B and Carrow_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_forward
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