Questions: Multiple Choice Question The myelin sheath is a spiral layer of insulation around a nerve fiber. dendrites muscle tissue insulation scar tissue

Multiple Choice Question
The myelin sheath is a spiral layer of insulation around a nerve fiber.
dendrites
muscle tissue
insulation
scar tissue
Transcript text: Multiple Choice Question The myelin sheath is a spiral layer of $\qquad$ around a nerve fiber. dendrites muscle tissue insulation scar tissue
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Solution

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The answer is the third one (insulation): the myelin sheath is a spiral layer of insulation around a nerve fiber.

Explanation for each option:

  • Dendrites: Incorrect. Dendrites are the branched extensions of a neuron that receive signals from other neurons. They are not related to the myelin sheath.
  • Muscle tissue: Incorrect. Muscle tissue is composed of muscle cells and is responsible for movement. It is not related to the myelin sheath.
  • Insulation: Correct. The myelin sheath acts as an insulating layer around nerve fibers, which helps to increase the speed at which electrical impulses travel along the nerve.
  • Scar tissue: Incorrect. Scar tissue forms as a result of injury and is not related to the myelin sheath.

Summary: The myelin sheath is a spiral layer of insulation around a nerve fiber.

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