Why Is a CNS Neuron Not Usually Replaced After It

question 172

Multiple Choice

Why is a CNS neuron not usually replaced after it is injured?

• A)Most CNS neurons are not replaced because we have an abundance of neurons and it is not necessary to replace any that are injured.
• B)Most CNS neurons are not replaced because the PNS neurons just take over the functions of any injured CNS neurons.
• C)Most CNS neurons are not replaced because it is not possible to replace any injured cell in the body.
• D)Most CNS neurons are not replaced because they contain Nissl bodies which prevents the cell from undergoing cellular division.
• E)Most CNS neurons are not replaced because they lack centrioles so they cannot divide.

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