★ Trichology Quiz
The process of hair turning grey is usually caused by:
A. the natural aging process
B. hair damaged at the papilla
C. hair fiber over 15 years in age
D. being exposed to excessive sunlight
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Which o the following refers to the ability of hair to stretch and return to its original shape without breaking?
A. texture
B. porosity
C. elasticity
D. breaking point
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