SCIENCE
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2 sec
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5 sec
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15 to 20 sec
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5 min
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Detailed explanation-1: -We lose consciousness if blood flow to the brain is cut off for more than 5 sec. Fainting is the sudden and temporary loss of consciousness. consciousness arises from neural activity in the cerebral cortex. Anything that disrupts neural activity in the cerebral cortex can cause loss of consciousness.
Detailed explanation-2: -Although the brain is only about 2% of the total body weight in humans, it receives 15-20% of the body’s blood supply.
Detailed explanation-3: -A stroke is your brain’s equivalent of a heart attack, happening when there’s an issue with blood flow to part of your brain. This can happen when blood vessels are blocked or because of bleeding in your brain.
Detailed explanation-4: -Aerobic exercise provides greater blood flow to your brain, especially to the hippocampus, a region that’s crucial to memory. A 2017 study in 51 healthy men and women, ages 18-35, found that those who had the highest fitness levels had a firmer, more elastic hippocampus and scored the best on memory tests.
Detailed explanation-5: -slurred speech. sudden weakness in the limbs. difficulty swallowing. loss of balance or feeling unbalanced. partial or complete loss of vision or double vision. dizziness or a spinning sensation. numbness or a tingling feeling. confusion. More items •27-Jun-2018