PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The blood-brain barrier is effective against the passage of:
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water
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alcohol
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anesthetics
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metabolic wastes such as urea
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Explanation:
Detailed explanation-1: -The purpose of the blood–brain barrier is to protect against circulating toxins or pathogens that could cause brain infections, while at the same time allowing vital nutrients to reach the brain.
Detailed explanation-2: -Answer and Explanation: The correct answer is D. Metabolic waste such as urea.
Detailed explanation-3: -Unfortunately for the brain, there is no barrier for ethanol. Ethanol crosses the blood-brain-barrier very easily. This is due to its chemical characteristics-although it is somewhat polar, it is also lipophilic, and so it mixes easily with the fat in the membrane.
There is 1 question to complete.