CH 13 COS/HD
Electricity travels how many miles per second?
186,000
Lightning bolts travel through the air at speeds of up to how many miles per hour?
60,000
Unit that measures the strength of an electric current
Ampere
Substances that speed up chemical reactions
Catalysts
Color component within the skin such as blood or melanin
Chromophore
Distilled water is a particularly good conductor.
False: Distilled water is a poor conductor, but the ions in ordinary water make it a good conductor.
Microcurrent travels throughout the entire body.
False: Microcurrent does not travel throughout the entire body; it serves only the specific area being treated.
Normal electric wall sockets that power a hair dryer or curling iron are 220 volts.
False: Normal electric wall sockets that power a hair dryer or curling iron are 120 volts; most air conditioners and clothes dryers run on 220 volts.
There are two types of electric current: direct and converted.
False: The two types of electric current are direct and alternating.
Extremely low level of electricity that mirrors the body's natural electrical impulses
Microcurrent
Currents used in electrical facial and scalp
Modalities
Unit that measures the resistance of an electric current
Ohm
The type of current that should not be used on clients who are pregnant, have high blood pressure, or have a pacemaker is:
Tesla high-frequency
A wall plate is also known as facial stimulator.
True
Electricity does not occupy space or have physical or chemical properties.
True
The heating element in a hair dryer heats up because it is not large enough to carry the electric current.
True
UV prompts the skin to produce vitamin D, a fat-soluble vitamin that promotes mineralization of bones.
True
Ultraviolet A light has the longest wavelength of the UV light spectrum.
True
Rapid and interrupted current that flows in one direction and then in the opposite direction is:
alternating current
The positive electrode is called a(n):
anode
The path of an electric current from the generating source back to the original source is a(n):
complete circuit
A substance that is a particularly good conductor of electricity is:
copper
The process used to treat acne and milia and soften and emulsify deposits in the hair follicles is:
desincrustation
An applicator that directs electric current from a machine to the client's skin is a(n):
electrode
Electronic facial treatments are commonly referred to as:
electrotherapy
The special device that prevents excessive current from passing through a circuit is a(n):
fuse
Rays with long wavelengths that penetrate more deeply and produce more heat than visible light are:
infrared rays
Rubber, silk, wood, and glass are common examples of:
insulators
Infusing water-soluble products into the skin with the use of electric current is known as:
iontophoresis
The electrical appliance connection that supplies current to the circuit is the:
live connection
The current for facial and scalp treatments is measured in:
milliamperes
Lasers work by a process that turns the light from the laser into heat called:
photothermolysis
The negative or positive pole of an electric current is referred to as the:
polarity
Cataphoresis forces acidic substances into deeper tissues using galvanic current from the:
positive toward the negative pole
Electricity is a form of energy that, when in motion, exhibits:
thermal effects, chemical effects, magnetic effects
Rays with short wavelengths that are the least penetrating, produce chemical effects, and kill germs are:
ultraviolet rays
Thermal or heat-producing current with a high rate of oscillation or vibration is:
violet ray
The unit that measures the pressure or force that pushes the flow of electrons forward through a conductor is a(n):
volt
A measurement of how much electricity is being used in 1 second is a(n):
watt
The distance between two successive peaks is called:
wavelength