Answer
Although the brain typically represents only 2% of body, it consumes 20% of glucose and oxygen available in the blood. The brain has a very high demand for glucose inorder to generate ATP molecules . The need of the brain is given top priority by the bod at all times. If adequte aupplies of the brain's need are not met even dor a brief period of 10 seconds the result can be inpairment of consciousness. .
Work Step by Step
Longer periods of inadequate supply of oxygen and glucose to brain tissue can have even graver consequences, For instance, insufficient supply of oxygen and glucose to the brain for two minutes can result serious decline in mental functioning. Deficient blood supply to the brain for over four minutes can result in irreparable brain damage
