Question

Fill in blanks

1.Although the number of cells in the brain remains about the same, cells ______increase__________ in size and the number of 2.________________________ increases.
3. At what age does the brain reach its full size? _____________
4. The brain is _________ % of the body’s weight.
5. The brain uses about ___________ % of the body’s oxygen and __________ % of the body’s blood flow. 6. Why do you think the brain needs SO MUCH of the body’s oxygen and blood flow, even though it is so little?

Answer 1

Although cells in the brain don't increase in number, they can increase in size. The brain reaches full size by age six and represents about 2% of the body's weight. The brain needs a lot of the body's oxygen and blood flow because it is the control center of the entire organism and uses glucose as its major fuel source.

Step-by-step explanation:

The number of cells in the brain remains about the same, but they can increase in size. Additionally, the number of neuronal connections in the brain increases. The brain reaches its full size by the age of six. It makes up about 2% of the body's weight. The brain uses about 20% of the body's total energy, 20% of the body's oxygen, and 20% of the body's blood flow.

The brain needs a lot of the body's oxygen and blood flow because it is the control center of the entire organism. It contains billions of neurons and glial cells, and these cells require a substantial amount of energy to function. Glucose is the major fuel source for the brain, and specific areas of the brain use different rates of glucose depending on the cognitive tasks being performed.