In the mammalian CNS,neural repair may be difficult because:
A)The adult nervous system makes too much of the chemical for growth,so the cell does not "know" in which direction to grow
B)Scar tissue may block the original pathway
C)The immune cells necessary for protection of the neuron during growth are no longer in the vicinity
D)Glial cells are absent

Question

Quizplus · Accepted Answer

Scar tissue can form after injury or damage in the CNS, and it may block the original pathway for neural connections. This can make neural repair difficult. The other options provided are not accurate, as the adult nervous system does not make too much of a chemical for growth (choice A), immune cells are not essential for neural repair (choice C), and glial cells are in fact present in the CNS and can play a role in neural repair (choice D).

In the Mammalian CNS,neural Repair May Be Difficult Because