The "locomotor" system includes which two systems?

The human musculoskeletal system (also known as the locomotor system, and previously the activity system) is an organ system that gives humans the ability to move using their muscular and skeletal systems.

Explanation:

having the certification could make the person more required to do a certain thing then another.this could also lead to different job offers or opportunities.

probably since the potency of the cocaine, not a lot, but i've never done any research on cocaine so i wouldn't know, but i would also guess it would determine on the gap between sniffs or if you did it all at once, so i really don't know.