Is insulin required for glucose to pass over the blood brain barrier?

Answer 1

Don't pay attention to any of the above until you read this:
http://www.boston.com/yourlife/health/diseases/articles/2006/01/30/insulin_in_the_brain/

Answer 2

Insulin is required to move glucose out of the blood into any cells in the human being.

Answer 3

I read recently that the brain makes it's own insulin! The lack of this ability is being researched as the cause of some diseases like alzhiemers. They pegged it Type 3 diabetes. Put in a search for Type 3, bet you get some hits

http://www.life-enhancement.com/article_template.asp?ID=1174
"It had long been thought that all of our insulin was produced by the pancreas, and it was known that insulin could gain access to the brain by crossing the blood-brain barrier. It was assumed, but not proved, that this “peripheral” insulin was actually utilized by the brain’s neurons in facilitating glucose transport. That question has become somewhat less important, however, since Dr. de la Monte and her colleagues discovered that the brain produces its own insulin. The brain also produces the vital insulinlike growth factors (small proteins very similar to insulin, with overlapping but not entirely duplicative functions); like insulin itself, these growth factors are necessary for neuronal survival.
In Alzheimer’s brains, however, the production of insulin and the insulinlike growth factors (IGFs) is severely curtailed, as is the production of the neuronal receptors upon which they critically depend in order to accomplish their biological functions. This surely impairs the insulin signaling pathway and, therefore, glucose metabolism (the primary source of our cells’ chemical energy) in the brain. Impaired brain metabolism is one of the best-documented abnormalities in Alzheimer’s. "

Answer 4

Nope. That is the only tissue in the body that does not require insulin in order to transmit glucose - according to the books I have read.

Answer 5

insulin is the "bus" that carries glucose into the cells.