Electric wires can be covered with a material that does not transmit electricity such as a rubber or plastic coating. This material is known _________________________

An apparatus that changes direct current to alternating current is __________________.

The term ______________ refers to a rapid and interrupted current, flowing first in one direction and then in the opposite direction.

The unit that measures the pressure or force that pushes the electric current forward through a conductor is _________________

Which unit of measures the resistance of an electric current?

The device that prevents excessive current from passing through a circuit is called ____________________.

A switch that automatically interrupts or shuts off an electric current at the first indication of an overload is ____________________.

The negative electrode of an electrotherapy device is called _____________________.

A process that infuses an alkaline product into the tissues from the negative pole toward the positive pole is called ___________________.

Grounding completes ________________________ and carries the current safely away.

All the electrical appliances you use should ______________________

When using _________________________, the active electrode is the electrode used on the area to be treated.

Microcurrent can be used to ________________________ and restore elasticity

Only licensed professionals should use _________________.

A wavelength is the distance between successive peaks of _________________ waves

Invisible light is the light at either end of the ________________ the is invisible to the naked eye.

Ultraviolet C (UVC) light __________________________.

Catalysts are substances that speed up __________________________.

All lasers work by a process known as selective _______________________.

Constant and direct current, having a positive and negative pole, which produces chemical changes when it passes through the tissues and fluids of the body is known as ________________ current.

An extremely low level of electricity that mirrors that body's natural electrical impulses is _______________________.

A medical device that uses multiple colors and wavelengths of focused light to treat conditions such as excessive hair and spider veins is _____________________.

The thermal or heat-producing current with a high rate of oscillation or vibration that is commonly used for scalp and facial treatments is called _________________.

A device that works releasing light onto the skin to stimulate specific responses at precise depths of the skin tissue is _______________.

For safety, use n more than ________ plug(s) in each outlet.

When __________________ is heated, it produces positive and negative ions that cancel the electric charges in the hair that cause static electricity.

The application of UV light must be done with the utmost care in a proper manner by a qualified professional because overexposure can lead to skin _________________________.

The use of ______________ light reduces acne and bacteria on the skin.

The unit that measures how much electric energy is being used in one second is __________________.