Definition of opacity for English Language Learners. : 1  the quality of a material that does not allow light to pass through it : the quality of being opaque. : 2  the quality of being difficult to understand or explain.
Research has shown that this is not true, and that brain cells can and do regenerate, especially in the areas related to learning, decision-making, visual recognition, and the way people perceive objects in space.weet. For a long time, scientists thought that it was impossible for brain cells to regenerate because they assumed that any new cells would disrupt the order of the brain.
Glial Cells Fight Disease And Injury. When you have a disease or injury that affects the brain, the glial cells fight back. Parkinson's Disease attacks glial cells, and they declare war and fight to the death against the illness.lial cells are just as important to your brain's functioning as your neurons, if not more so. They're like the little army that supports your brain and bravely fights off all who try to harm it. Research on glial cells is ongoing and hopefully will lead to even better treatments for brain and nervous system disorders.