Human Anatomy
9th Edition
ISBN: 9780135168059
Author: Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon
Publisher: Pearson Education, Inc.,
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Chapter 12, Problem 18CYU
From your understanding of the functions of myelin and functions of the white matter tracts of the CNS, explain how the loss of myelination in the CNS, as occurs in multiple sclerosis, can cause the signs and symptoms typical of this disease.
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Chapter 12 Solutions
Human Anatomy
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 - Prob. 1RQCh. 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
- A new drug is developed that prevents the demyelination occurring in the progress of multiple sclerosis. The drug protects the cells responsible for the synthesis and maintenance of myelin in the central nervous system. These cells are most likely which of the following? (A) Astrocyte (B) Ependymal cell (C) Microglial cell Oligodendrocyte (E) Schwann cellarrow_forwardSmall intestine (or other visceral organ) CNS (spinal cord) Skeletal muscle Figure 14.1 Using Figure 14.1, match the following: 11) Myelin sheath. 11) 12) Cell body of ANS preganglionic neuron. 12) - 13) Cell body of ANS postganglionic neuron. 13) 14 14) Cell body of the somatic neuron. TIPLE CHOICE. Choose the one alternative that best completes the statement or answers the qu 15) Which of the following is not a function of astrocytes? A) guide the migration of young neurons, synapse formation, and helping to determine ca permeability B) support and brace neurons C) anchor neurons to blood vesselsarrow_forward37) Multiple sclerosis is a disease in which the body attacks its own nervous system and specifically affects the myelin. Its many symptoms include a person having a reduced sense of touch. Explain how the disease effects the conduction of information and what class of neurons appears to be affected to cause this symptom.arrow_forward
- Multiple sclerosis (MS) is a condition in which neurons in the CNS become demyelinated. Why do you think a NCV (nerve conduction velocity) test is not useful in diagnosing MS?arrow_forwardSchwann cells are a type of glial cell found in the nervous system. In addition to the conduction of nerve impulses, the outermost layer called neurilemma aids in nerve development and regeneration. Which of the following explains why the neurons in the brain cannot repair damage like the neurons in your hands or feet can?arrow_forwardA presynaptic neuron in the cerebrum transmits information to hundreds of other neurons. This process is an example of (a) convergence (b) divergence (c) temporal summation (d) spatial summation (e) a graded potentialarrow_forward
- With respect to the three structural types of neurons (unipolar, bipolar & multipolar): State which parts of each type of neuron receive information, which parts integrate information, and which parts conduct the output signal of the neuron. Describe the location of the cell bodies of each type of neuron within the nervous system.arrow_forwardMultiple sclerosis is a demyelinating disease affecting the central nervous system. What type of cell would be the most likely target of this disease? Why? Which type of neuron, based on its shape, is best suited for relaying information directly from one neuron to another? Explain why. Sensory fibers, or pathways, are referred to as “afferent.” Motor fibers, or pathways, are referred to as “efferent.” What can you infer about the meaning of these two terms (afferent and efferent) in a structural or anatomical context?arrow_forwardList the types of glial cells and assign each to the proper division of the nervous system, along with their function(s) Categorize the major neurotransmitters by chemical type and effect Locate regions of the cerebral cortex on the basis of anatomical landmarks common to all human brainsarrow_forward
- Fill in the descriptions for the following terms as they relate to the PNS or CNS neural tissue: Tract: Bundles of [ Select ] ["axons", "cell bodies"] in the [ Select ] ["CNS", "PNS"] Nerve: Bundles of [ Select ] ["axons", "cell bodies"] in the [ Select ] ["CNS", "PNS"] Ganglion: Bundles of [ Select ] ["axons", "cell bodies"] in the [ Select ] ["CNS", "PNS"] Nucleus: Bundles of [ Select ] ["axons", "cell bodies"] in the [ Select ] ["CNS", "PNS"]arrow_forwardUnmyelinated axons conduct action potentials without decrement, but when myelinated axons lose myelin in demyelinating diseases such as multiple sclerosis, conduction of action potentials is blocked. Why?arrow_forwardSummarize the functions of each of the types of neuroglia (the exam will not ask about satellite cells) and describe how the myelin sheath is formed around a peripheral nervous system neuron. Explain why nerve impulse propagation is compromised in patients with multiple sclerosis. Distinguish between the composition of white matter and gray matter.arrow_forward
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