Rats Placed in Isolated and Unenriching Environments Become Learning-Impaired Due

Multiple Choice

Rats placed in isolated and unenriching environments become learning-impaired due to the:

A) increased development of dendritic spines.
B) lack of development of proper neurotransmitters.
C) development of large numbers of glial cells.
D) biochemical changes resulting in a heavier cerebral cortex.
E) poor development of synaptic contacts.