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🔬 Biology  ·  Neural Control and Coordination  ·  NEET

The white matter of the central nervous system looks white because of the presence of:

Answer: Myelin sheaths.

  • A Myelin sheaths
  • B Grey neuron bodies
  • C Many blood vessels
  • D Cerebrospinal fluid

Correct answer: A. Myelin sheaths

Explanation: White matter is made of myelinated axons; the fatty myelin gives it its white appearance.

Labeled diagram of a neuron showing dendrites, cell body (soma) with nucleus, axon, myelin sheath, Nodes of Ranvier, and axon terminals

Structure of a neuron. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.

Concept context

Brain, spinal cord, neurons, reflex arcs, and sense organs.

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