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

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

NOTE: Make sure you answer all parts of the discussion  question. You will be graded on: General Requirement(s): Preparation:  Read the directions for the discussion board prior to participation. Make sure to use proper  grammar, punctuation, and proper APA citation, when writing your initial  post.