How are specific cells adapted for their functions and how may these cells be damaged by some drugs:)

Each cell, tissue, or organ have specificity when it comes to functions. Their action is based on the instruction of their genes. Body cells have their innate regulations in terms of bad encounters. They have the ability to protect itself from foreign materials. They are able to differentiate self from non-self. Normal response would be, the body cells tend to buffer or neutralize anything that can cause damage to our system. But there are some instances that body can no longer handle the unfriendly foreign materials. Failure may occur once compensations can not anymore cater the action of devastating drugs despite the struggle of liver substances and other somatic enzymes.