Multiple sclerosis is an autoimmune disease caused by attack of a person\'s immu
ID: 212573 • Letter: M
Question
Multiple sclerosis is an autoimmune disease caused by attack of a person's immune system on her/his oligodendrocytes. Neurons are unaffected. Symptoms of the disease include numbness, weakness, visual disturbances, and loss of motor coordination. Which explanation below best explains these symptoms? A. Oligodendrocytes are responsible for myelination in the CNS, and their removel delays action potential propagation and disrupts timing necessary for accurate perception and motor control. B. Oligodendrocytes control nutrition of neurons, and their removal compromises neuron function. C. Oligodendrocytes are responsible for the blood-brain barrier, and disruption of this barrier kills neurons in the affected area. D. Loss of oligodendrocytes prevents the neurons from functioning, therefore no action potentials can pass through the diseased area. (I'm 99.9% sure it's not D)
Explanation / Answer
ans)
c) Oligodendrocytes are responsible for the blood-brain barrier, and disruption of this barrier kills neurons in the affected area.
Multiple sclerosis is a potentially disabling disease of brain and spinal cord.symptoms and signs depends on the amount of nerve dammage and area affected.there is no cure for multiple sclerosis.treatment can help from recovery from attacks.
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