There are two kinds of digestion: mechanical and chemical. Mechanical digestion involves physically breaking the food into smaller pieces. Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells.
Answer: It tests an employee believed to be impaired by drugs and unfit for work.
Explanation:
The random drug testing is done at the workplace. This is done to check whether the employees are consuming drugs. The testing also helps to identify the recent use of the illicit drugs, dose consumed and use of alcohol. The random testing does not test the impairment caused due to stress or other reasons.
The tests are done randomly on employees and these are likely inspection of the physical status of the employees to check whether they are using drugs and how drugs have affected and impaired the body which is making the employees unfit to perform their daily work. Those employees which are found illicit drug user are warned and expelled from the service.
