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Multiple sclerosis is described in the chapter as an autoimmune disorder involving a large-scale loss of:
ADendrites across the cortex
BSynaptic vesicles in the terminals
CDopamine-producing cell bodies
DThe myelin sheath on axons
Answer & Solution
Correct answer: D. The myelin sheath on axons
1. Multiple sclerosis is an autoimmune disorder affecting the nervous system.
2. It involves a large-scale loss of the myelin sheath on axons throughout the nervous system.
3. Because myelin speeds transmission, its loss interferes with the electrical signal and prevents quick transmittal.
4. The chapter lists dizziness, fatigue, loss of motor control and sexual dysfunction as symptoms, and notes there is currently no known cure.
_Source: OpenStax Psychology (1st ed., CC BY 4.0), Ch 3 "Biopsychology", §3.2 Cells of the Nervous System_
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