Performance-enhancing drugs are substances that are used to improve any form of activity and sport performance.
Most physical effects of performance-enhancing drugs are reversible, with the exception: Damage to the myocardium, which is not reversible. Performance-enhancing drugs may have an effect on the cardiovascular system by directly altering the myocardium.Correct answer: B
Because they stretch the muscles used during the workout.
D it takes time to develop to them
If the cell membrane does not function normally it allows abnormal movement of substance in and out of the cell, lets take for example the movement of water of plasma membrane allows water to get in into the cell more than what is needed it might cause the bursting of the cell or if it allows water from the cell to get out and leaves only solute within this will cause shrinking of the cell wherein both conditions are abnormal
