Mandatory public health warnings are susceptible to misinterpretation.

Active assistive range of motion is performed by:

a. moving the patient's joint or muscle through the motion while the patient assists by relaxing. b. assisting the patient to move through available motion by stabilizing the proximal joints. c. assisting the patient to move through the available motion. d. watching the patient move actively, ensuring that the patient is moving correctly and safely.

Vacuum regulators operate by:

A) adjusting magnetic attraction against a diaphragm B) changing the size of an orifice C) adjusting pressure on a single-stage reducing valve D) changing the position of a needle valve