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Human Hair and Its Functions

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Questions and Answers

What is the primary function of hair in many mammals?

To provide thermal insulation and thermoregulation

To serve as a sensory organ (correct)

To enhance social and sexual roles

To aid in pheromone dissemination

What is the classification of individuals with excessive hair in undesirable locations due to genetics or medical conditions?

Hypertrichosis

Trichosis

Hirsutism (correct)

Hypertichosis

What is the most recent method of hair removal mentioned in the text?

Electrolysis

Topically applied eflornithine 13.9% (correct)

Waxing

Shaving

What was widely used in the early twentieth century for facial hair removal in women?

Radiograph machines Signup and view all the answers

What is the ranking of laser hair removal among non-surgical cosmetic practices?

Third most commonly done Signup and view all the answers

What is the primary reason why lasers using ablative techniques are not commonly used for hair removal today?

Due to their limited effectiveness and induced permanent pigmentary changes and scarring Signup and view all the answers

What was the wavelength of the red light emitted by the first working laser developed by Maiman?

694 nm Signup and view all the answers

What was the significance of the theory of selective photothermolysis in laser-tissue interaction?

It enabled lasers to target specific structures in the skin without damaging surrounding tissues Signup and view all the answers

What is the significance of the thermal relaxation time (TRT) in laser-tissue interaction?

It is the time of tissue exposure to the laser to limit damage to surrounding tissues Signup and view all the answers

What was the first FDA-approved laser for hair removal in the United States?

Nd:Yag laser Signup and view all the answers