Four healthy people in their twenties got involved in injuries resulting in damage and death of few cells of the following. Which of the cells are least likely to be replaced by new cells?
A
Osteocytes
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B
Malpighian layer of the skin
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C
Liver cells
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D
Neurons
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Solution
The correct option is D Neurons The nervous system is divided into two parts: the central nervous system, which consists of the brain and spinal cord, and the peripheral nervous system, which consists of cranial and spinal nerves along with their associated ganglia. While the peripheral nervous system has an intrinsic ability for repair and regeneration, the central nervous system is incapable of self-repair and regeneration. There is currently no treatment for recovering human nerve function after injury to the central nervous system.