Question 1

What process occurs during desincrustation, and which galvanic pole is used?

Accepted Answer

Desincrustation uses the negative pole (cathode) to deliver an alkaline current that saponifies sebum, softening and liquefying oil and debris in the follicle to prepare skin for deep cleansing.

Question 2

What is the difference between direct and indirect high-frequency application techniques?

Accepted Answer

Direct high-frequency applies the glass electrode directly to the skin to produce sparking, ozone, and germicidal effects; indirect application has the client hold the electrode while the esthetician massages, creating warmth and relaxation.

Question 3

How does microcurrent stimulate the skin at the cellular level?

Accepted Answer

Microcurrent delivers sub-sensory electrical impulses that mimic the body's own bioelectrical signals, stimulating ATP (adenosine triphosphate) production in cells, which fuels fibroblast activity, collagen synthesis, and tissue repair.

Question 4

What wavelength range does red LED light occupy, and what are its primary skin benefits?

Accepted Answer

Red LED light operates in the 630–700 nm range and penetrates into the dermis to stimulate fibroblast activity, boost collagen and elastin production, accelerate healing, and reduce inflammation.

Question 5

What is the difference between 1 MHz and 3 MHz ultrasound frequencies in esthetic treatments?

Accepted Answer

1 MHz ultrasound penetrates deeper into the dermis and subcutaneous tissue and is suited for body or deeper facial treatments, while 3 MHz penetrates more superficially and is preferred for facial skin care and product penetration.

NIC Esthetics Exam — Electricity & Equipment

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