Proteins are the nutritional class which builds and maintains cells and tissues. The type are often called "structural" since they are like the scaffolding of cells and tissues.
Answer is too long, in order to have a simple answer, or any answer you would have to put this question into chunks, or youll have to wait for atleast 2-5hours
Alcohol is considered a depressant drug because it slows neurotransmisson levels and can reduce stimulation. Basically some people drink to stop feeling.
These activities are not appropriate because the muscles stretched are not warm yet.
hope this helps :)
