What is the movement of electrons from one atom to another along a conductor?

What is another name for materials that are nonconductors?

Rubber, silk, wood, and glass are common examples of:

The path of an electric current from the generating source through the conductors and back to the original source is a(n) _____ electric circuit.

What are two types of electric current?

Which phrase best describes direct current?

Rapid and interrupted current that flows in one direction and then in the opposite direction is known as _____ current.

Normal electric wall sockets that power a hair dryer or curling iron are _____ volts.

What unit measures the strength of an electric current?

The current for facial and scalp treatments is measured in:

A measurement of how much electricity is being used in one second is a(n):

A special device that prevents excessive current from passing through a circuit is a(n):

Currents used in electrical facial and scalp are called:

The negative or positive pole of an electric current is referred to as the:

A positive electrode is called a(n):

What is the process of infusing water-soluble products into the skin using electric current?

Cataphoresis forces acidic substances into deeper tissues using galvanic current from the:

What term refers to a form of anaphoresis used to treat acne, milia, and comedones?

What is another term for Tesla high-frequency current?

What type of current should be avoided for clients who are pregnant, have high blood pressure, or have a pacemaker?

What term refers to the distance between two successive peaks of electromagnetic waves?

UV light prompts the skin to produce _____, a fat-soluble vitamin that is good for bone growth and health.

It is estimated that one in five Americans will develop skin cancer and that 90 percent of those cancers will be the result of exposure to:

What is a type of cold light that is blocked by the ozone layer?

What term refers to substances that speed up chemical reactions?

Light therapy is known as:

All lasers work by selective _____, a process that turns the light from the laser device into heat.

What general term refers to a color component within the skin such as blood or melanin?

Which LED therapy is associated with increasing circulation and improving collagen and elastin production in the skin?