What does the "M" in M codes stand for?

After establishing a saline lock, the medication port should be cleaned and injected with how much normal saline?

a. 0.5–1.0mL c. 5.0–7.0mL b. 3.0–5.0mL d. 7.0–10.0mL

The term subluxation describes:

A) partial displacement of a joint. B) gross dislocation of a joint. C) a fracture with exposed bone ends. D) bleeding into a muscle compartment.