Colorado Cosmetology Written Practice Exam

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Skin gets its strength, form, and flexibility from:

Collagen and elastin
Keratocyte and keratin
Melanin and keratin
Water and keratin

The correct answer is: Collagen and elastin

Skin gets its strength, form, and flexibility from a combination of collagen and elastin, which are two types of protein found in the skin. Collagen provides structure and support, while elastin allows the skin to stretch and snap back into place. Option B is incorrect because keratocyte is a type of cell found in the skin that produces keratin, but it does not contribute to skin strength, form, or flexibility. Option C is incorrect because melanin is a pigment that gives skin its color and keratin is a protein that makes up hair, nails, and the outer layer of skin, but neither contribute to skin strength, form, or flexibility. Option D is incorrect because while water does play a role in keeping the skin hydrated, it does not contribute to skin strength, form, or flexibility.