The human brain consumes__________ percent of the body's total oxygen and blood supply?
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Answer: A. 20
Explanation
The human brain consumes roughly twenty percent of the body total oxygen. It also requires a significant share of the total blood supply. This high metabolic demand powers continuous electrical signaling between neurons. The brain is the command center of the human nervous system. Metabolic activity in neural tissue requires a constant delivery of glucose and oxygen. Blood vessels network extensively through the brain to sustain high activity.
Neurologists study cerebral blood flow to understand stroke and brain injuries. Interruption of oxygen supply to the brain causes unconsciousness within seconds. Mental concentration requires sustained energy delivered by the cardiovascular system. Twelve percent underestimates the actual oxygen consumption rate of the brain. Thirty five percent is higher than the average resting brain energy share. Forty eight percent greatly exaggerates the normal metabolic oxygen demand.
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- Everyday Science
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- Everyday Science
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- medium
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