Question
Biology Question on neural control and coordination
Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells of the following. Which of the cells are least likely to be replaced by new cells?
A
Osteocytes
B
Malpighian layer of the skin
C
Liver cells
D
Neurons
Answer
Neurons
Explanation
Solution
Neurons have the lowest likelihood of being replaced by new cells. Neurons, which are specialized nerve cells, generally lack significant regenerative capabilities, especially in most areas of the adult human brain and spinal cord. In contrast:
- Osteocytes, responsible for bone maintenance, can be replaced over time, particularly in response to bone injuries or changes.
- Malpighian layer of the skin have a relatively fast turnover rate, as new skin cells continually replace old or damaged ones.
- Liver cells, residing in the liver, possess impressive regenerative potential, allowing the liver to recover from various forms of injury or cell loss.
In summary, neurons are the least likely to be replaced by new cells, while the other cell types mentioned exhibit varying degrees of replacement and regeneration mechanisms.
∴The correct option is (D): Neurons.