MCAT Biology Question 49: Answer and Explanation

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Question: 49

4. Which of the following correctly describes a difference between nerves and tracts?

  • A. Nerves are seen in the central nervous system; tracts are seen in the peripheral nervous system.
  • B. Nerves have cell bodies in nuclei; tracts have cell bodies in ganglia.
  • C. Nerves may carry more than one type of information; tracts can only carry one type of information.
  • D. Nerves contain only one neuron; tracts contain many neurons.

Correct Answer: C

Explanation:

Nerves are collections of neurons in the peripheral nervous system and may contain multiple types of information (sensory or motor); they contain cell bodies in ganglia. Tracts are collections of neurons in the central nervous system and contain only one type of information; they contain cell bodies in nuclei.

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