Explain...

 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.