Explain the processes involved when drugs such as cocaine, marijuana, mescaline or alcohol enter the brain....

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Psychology

Explain the processes involved when drugs such as cocaine,marijuana, mescaline or alcohol enter the brain. You may draw adiagram to amplify your explanation.

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The brain is a highly specialized organ One of its marvels is that it is not easy for many moleculaes to get into the brain It is naturally protected by a barrier from potentially harmfrul molecules by what is known as a Blood brain barrier However some drugs have the ability to cross this barrier These are such that they can dissolve in fats or lipids hence called lipophilic Nicotine marijuana heroin and ethanol which is present in alcohol are lipophilic and do manage to enter the brain Transporters carry these compounds across the barrier through a process See Answer

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