LED
Which LED therapy is associated with increasing circulation and improving collagen and elastin production in the skin?
Red light LED
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 _____.
UV radiation
When electricity is in motion it exhibits magnetic, ______, or thermal effects.
chemical
What unit measures the resistance of an electric current?
Ohm
The negative or positive pole of an electric current is referred to as the _____.
polarity
A positive electrode is called a(n) _____.
anode
What part of the electromagnetic spectrum has rays that penetrate more deeply and produce more heat than visible light?
Infrared light
What term refers to an extremely low level of electricity that mirrors the body’s natural electrical impulses?
Microcurrent
All the electrical appliances you use should be _____ certified.
UL
A special device that prevents excessive current from passing through a circuit is a(n) _____.
fuse
Currents used in electrical facial and scalp are called _____.
modalities
What general term refers to a color component within the skin such as blood or melanin?
Chromophore
An applicator that directs electric current from a machine to the client’s skin is a(n) _____.
electrode
Cataphoresis forces acidic substances into deeper tissues using galvanic current from the _____.
positive toward the negative pole
What is another name for materials that are nonconductors?
Insulators
What term refers to the distance between two successive peaks of electromagnetic waves?
Wavelength
The use of electrical currents to treat the skin is commonly referred to as _____
electrotherapy
What is the shortest and least penetrating light of the electromagnetic spectrum?
Ultraviolet light
UV light prompts the skin to produce _____, a fat-soluble vitamin that is good for bone growth and health.
vitamin D
All lasers work by selective _____, a process that turns the light from the laser device into heat.
photothermolysis
A measurement of how much electricity is being used in one second is a(n) _____.
watt
What is a type of cold light that is blocked by the ozone layer?
UVC
What unit measures the strength of an electric current?
Ampere
The unit that measures the pressure or force that pushes the flow of electrons forward through a conductor is a(n) _____.
volt
The path of an electric current from the generating source through the conductors and back to the original source is a(n) _____ electric circuit.
complete
What type of current should be avoided for clients who are pregnant, have high blood pressure, or have a pacemaker?
Tesla high-frequency
What is another term for Tesla high-frequency current?
Violet ray
What term refers to a form of anaphoresis used to treat acne, milia, and comedones?
Desincrustation
What is the process of infusing water-soluble products into the skin using electric current?
Iontophoresis
When working with electricity, appliances with a _____ offer the most protection for you and your clients.
three-prong plug
Light therapy is known as _____.
phototherapy
Which phrase best describes direct current?
Produced by chemical means
What term refers to substances that speed up chemical reactions?
Catalysts