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.
Add your answer. How long does it take for the human body to fully regenerate all of its cells? I've heard people say it takes 6 months/7 years/15 and a half years to fully regenerate every single one of your cells.What is the real length of time it takes? source please.eport Abuse. You will have a completely regenerated body when the longest living cells in your body regenerate because they're the limiting factor in your question, doesn't matter how fast the short lived ones regenerate just how long the longest living ones do.