Final answer:
The brain consumes about half of the glucose circulating in the body due to its glucose-dependent nature. Specific areas of the brain use glucose at different rates, depending on the level of activity and concentration.
Step-by-step explanation:
The brain consumes about half of the glucose circulating in the body. The brain is a glucose-dependent organ and uses glucose as its primary energy source. The average adult brain represents about 2% of our body's weight but uses 25% of the glucose in the body. Specific areas of the brain use glucose at different rates, with some areas needing more glucose during activities that require extra concentration.