| A | B |
|---|
| The flow of electricity along a conductor is called an | electric current |
| Electric wires are usually covered with a rubber substance that is used as an | insulator |
| A _______ is a device that changes direct current to alternating current. | converter |
| The term _______ refers to a rapid and interrupted current that flows in one direction then in the opposite direction. | alternating current |
| The unit that measures the pressure or force that pushes the flow of electrons through a conductor is a | volt |
| Which unit measures the resistance of an electric current | ohm |
| The device that prevents excessive current from passing through a circuit is called a | fuse |
| A switch that actomatically interrupts or shuts off an electric current at the first indication of an overload is a | circuit breaker |
| The negative electrode of an electrotherapy device is called an | cathode |
| A process that forces an alkaline product into the tissues from the negative toward the positive pole is called | anaphoresis |
| Grounding completes a(n) ______ and carries the current safetly away. | electric circuit |
| All the electrical appliances you use should | be UL certified |
| When using _____ , the active electrode is the electrode used on the area to be treated. | galvanic current |
| Microcurrent can be used to ______ and restore elasticity. | increase muscle tone |
| Only licensed professionals can use | light therapy equipment |
| A wavelength is the distance between successive peaks of ____ waves. | electromagnetic |
| Invisible light is the light at either end of the ____ that is invisible to the naked eye. | visib le spectrum of light |
| UVC light | is blocked by the ozone layer |
| Catalysts are substances that speed up | chemical reactions |
| All lasers work by a process known as selective | photothermolysis |
| Constant and direct current, having a positive and negative pole, that produces chemical changes when it passes through the tissue and fluids of the body is known as _____ current. | galvanic |
| An extremely low level of electricity that mirrors the body's natural electrical impulses is | microcurrent |
| A medical device that uses multiple colors and wavelengths of focused light to treat such conditions as excessive hair and spider veins is an | intense pulse light |
| The thermal or heat-producing current with a high rate of oscillation or vibration commonly used for scalp and facial treatments is called | Tesla high-frequency current |
| A device that works by releasing light onto the skin to stimulate specific responses at precise depths of the skin tissue is a | light-emitting diode |
