The definition is A, inability to sleep.
Specific, remember that the more specific you are, the more likely you are to achieve your goal.
Measurable, set a time, distance or other way to track your progress.
Attainable, to ensure you are setting a goal that is attainable, it is important to develop the necessary attitude and determination that you can do this.
Realistic, it is important to believe that you can do what you set your mind to, but it is also important to assess where you are starting and what is appropriate for you at that time
Timely if you don't set a realistic time frame, chances are you won't make much progress.
Hope this helps!!!
~BBGLUVER
Drugs interfere with the way neurons send, receive, and process signals via neurotransmitters. Some drugs, such as marijuana and heroin, can activate neurons because their chemical structure mimics that of a natural neurotransmitter in the body.