If not insulin, that what is the magic word?
April 10, 2012 2:11 PM Subscribe
Why can't brain cells collect glucose in a concentration from the blood or how do the cells break it down?
posted by JujuB to Science & Nature (4 answers total) 2 users marked this as a favorite
I understand that the body needs insulin to facilitate the movement of glucose into the cells, also that the brain cells do not rely on insulin to utilize glucose in the blood.
Yet, my book states, "The brain cells cannot make glucose, they cannot
store glucose for more than a few minutes, nor can they collect glucose in a concentration from the blood."
A paragraph further down reads, "One organ that does not need insulin to help move glucose into the cells is the brain. Glucose will cross the blood-brain barrier readily, whether insulin is present or not."
So what does the brain cell use to transfer concentrated glucose from the blood?
I'm in school for Emergency Medical Tech, this is not a homework question, I'm just confused at the contradiction.