LASER test 2025 Questions and
Answers 100% Pass
The term "LASER" is an acronym for: - ✔✔light amplification by stimulated emission of
radiation
The very first therapeutic laser (of any class) received 510k market clearance from the
United States Food and Drug Administration (FDA) in _____.And the first class 4
therapy laser gained FDA clearance in _____. - ✔✔2002 , 2003
In the late 1960's he made the observation that the hair of shaved mice grew back more
rapidly after exposure to low power laser light. As a result he is known as the 'Father of
Laser Therapy'. Who is he? - ✔✔Dr. Endre Mester
In 2015 a world-wide panel of experts designated the term ____________ to describe the
therapeutic use of light. - ✔✔photobiomodulation, or PBM
Surgical lasers cut tissue; and are used for performing surgery, removal of 'lumps and
bumps', and other ablative laser procedures. What is the mechanism of action for
surgical lasers? - ✔✔Photothermal: the laser light has a very high power density and
causes excessive heating of water molecules, which vaporizes the water, "explodes" the
cells, and thus cuts the tissue.
Therapeutic lasers help to enhance tissue healing, and are used for pain management,
wound and injury healing, and other uses. What is the mechanism of action for
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 1
, therapeutic lasers? - ✔✔Both A and C are correct (Photochemical and
Photobiostimulative)
Wavelength measures the distance between two corresponding points on adjacent light
waves, for example from one peak to the next, or from one trough to the next. Which is
the proper unit for measuring wavelength? - ✔✔nanometers (nm)
t or f- Compared to healthy cells, compromised or unhealthy cells in tissues that are
injured or damaged are more 'reduced'. This means that damaged cells will more
readily absorb oxygen; and therefore damaged tissues will respond more readily to
laser therapy. - ✔✔true
t or f- The "electromagnetic spectrum" is used to describe the entire range of radiation -
including gamma rays, x-rays, ultraviolet, visible light, infrared, microwaves, and radio
waves. Therefore, it is appropriate to refer to all of these as "electromagnetic radiation".
- ✔✔true
t or f- Power is the rate of energy delivery, and Power = Energy ÷ Time (Power equals
energy divided by time)
Proper units are: 1 Watt = 1 Joule ÷ 1 second. (One Watt equals one Joule per second.) -
✔✔true
Photons of laser light are absorbed by water molecules, hemoglobin, mitochondrial
enzymes and other tissue components. The general name for these components is
_______________. - ✔✔chromophores
When therapeutic laser light is absorbed by enzymes in the mitochondria the result is
an increase in the production of ________, which leads to normalization of cell function,
pain relief, and healing. - ✔✔adenosine tri-phosphate (ATP)
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 2
Answers 100% Pass
The term "LASER" is an acronym for: - ✔✔light amplification by stimulated emission of
radiation
The very first therapeutic laser (of any class) received 510k market clearance from the
United States Food and Drug Administration (FDA) in _____.And the first class 4
therapy laser gained FDA clearance in _____. - ✔✔2002 , 2003
In the late 1960's he made the observation that the hair of shaved mice grew back more
rapidly after exposure to low power laser light. As a result he is known as the 'Father of
Laser Therapy'. Who is he? - ✔✔Dr. Endre Mester
In 2015 a world-wide panel of experts designated the term ____________ to describe the
therapeutic use of light. - ✔✔photobiomodulation, or PBM
Surgical lasers cut tissue; and are used for performing surgery, removal of 'lumps and
bumps', and other ablative laser procedures. What is the mechanism of action for
surgical lasers? - ✔✔Photothermal: the laser light has a very high power density and
causes excessive heating of water molecules, which vaporizes the water, "explodes" the
cells, and thus cuts the tissue.
Therapeutic lasers help to enhance tissue healing, and are used for pain management,
wound and injury healing, and other uses. What is the mechanism of action for
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 1
, therapeutic lasers? - ✔✔Both A and C are correct (Photochemical and
Photobiostimulative)
Wavelength measures the distance between two corresponding points on adjacent light
waves, for example from one peak to the next, or from one trough to the next. Which is
the proper unit for measuring wavelength? - ✔✔nanometers (nm)
t or f- Compared to healthy cells, compromised or unhealthy cells in tissues that are
injured or damaged are more 'reduced'. This means that damaged cells will more
readily absorb oxygen; and therefore damaged tissues will respond more readily to
laser therapy. - ✔✔true
t or f- The "electromagnetic spectrum" is used to describe the entire range of radiation -
including gamma rays, x-rays, ultraviolet, visible light, infrared, microwaves, and radio
waves. Therefore, it is appropriate to refer to all of these as "electromagnetic radiation".
- ✔✔true
t or f- Power is the rate of energy delivery, and Power = Energy ÷ Time (Power equals
energy divided by time)
Proper units are: 1 Watt = 1 Joule ÷ 1 second. (One Watt equals one Joule per second.) -
✔✔true
Photons of laser light are absorbed by water molecules, hemoglobin, mitochondrial
enzymes and other tissue components. The general name for these components is
_______________. - ✔✔chromophores
When therapeutic laser light is absorbed by enzymes in the mitochondria the result is
an increase in the production of ________, which leads to normalization of cell function,
pain relief, and healing. - ✔✔adenosine tri-phosphate (ATP)
COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED 2
