Below you can find the The adult human brain is made up of approximately 100 billion of this type of nerve cell Jeopardy Words Answer. The answer to The adult human brain is made up of approximately 100 billion of this type of nerve cell has 7 letters. This clue belongs to the That's amazing! category and is part of Jeopardy Word Level 865. If you scroll near the bottom you will find other clues and answers part of level 865