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Suppose a neuron found in the human embryonic stage were to structurally mature into a typical neuron of the cerebral cortex. Which of the following describes the primary morphological change it must undergo?

Options

  1. AIt would develop one additional axon and multiple dendrites.
  2. BIt would develop exactly one dendrite while retaining its single axon.
  3. CIt would develop one additional dendrite, assuming it already possesses one.
  4. DIt would develop two or more dendrites while retaining its single axon.

Correct answer

D. It would develop two or more dendrites while retaining its single axon.

Step-by-step solution

According to NCERT, neurons in the embryonic stage are typically unipolar, which means they consist of a cell body with one axon only and lack dendrites. Neurons in the cerebral cortex are multipolar, meaning they possess one axon and two or more dendrites. Therefore, to transition from an embryonic (unipolar) neuron to a cerebral cortex (multipolar) neuron, the cell must develop two or more dendrites while retaining its single axon. Option 1 is incorrect because multipolar neurons have only one axon. Option 2 is i

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