CLT Skin Anatomy & Treatment Selection 2

Question 1

Which skin layer contains the majority of collagen and elastin fibers responsible for skin firmness?

Accepted Answer

Dermis

Answer

The dermis contains the bulk of collagen and elastin fibers that provide structural support and elasticity to the skin.

Question 2

A patient presents with Fitzpatrick Skin Type V. Which laser parameter adjustment is most appropriate to reduce risk of post-inflammatory hyperpigmentation?

Accepted Answer

Lower fluence and use longer wavelengths

Answer

Lower fluence combined with longer wavelengths (which penetrate deeper with less epidermal absorption) reduces PIH risk in darker skin types.

Question 3

The Langerhans cells found in the epidermis serve primarily which function?

Accepted Answer

Immune surveillance and antigen presentation

Answer

Langerhans cells are dendritic immune cells in the epidermis that detect and present antigens to initiate immune responses.

Question 4

Which chromophore is the primary target when using a 1064 nm Nd:YAG laser for hair removal on darker skin types?

Accepted Answer

Melanin

Answer

Melanin in the hair follicle is the primary chromophore targeted by the 1064 nm wavelength for hair removal.

Question 5

Actinic keratoses are considered precancerous lesions arising primarily from which skin layer?

Accepted Answer

Epidermis

Answer

Actinic keratoses originate in the epidermis due to cumulative UV-induced DNA damage to keratinocytes.

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(CLT) Certified Laser Technician Practice Test

CLT Skin Anatomy & Treatment Selection 2