What is the name of the protective insulation that surrounds parts of neurons and speeds the transmission of electrical impulses along brain cells but also adds to brain weight?

College students are more likely to find their experience satisfying at a small college than at a large university

Indicate whether this statement is true or false.

Today, the term most often used instead of "mental retardation" is:

a. learning disability b. intellectual disability c. intellectual educational personality d. failure to thrive syndrome