Colorado Cosmetology Written Practice Exam 2026 - Free Cosmetology Practice Questions and Study Guide

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What is elastin?

A protein that supports immune function

A protein that aids in digestion

A fibrous protein that gives skin its flexibility

Elastin is a type of protein that is found in many connective tissues in the body, including the skin, ligaments, and blood vessels. It is responsible for giving these tissues their ability to stretch and recoil, allowing for movement and elasticity. A is incorrect because immune function is primarily supported by antibodies and white blood cells, not elastin. B is incorrect because digestion is mainly aided by enzymes and stomach acids, not elastin. D is incorrect because oxygen is primarily transported by red blood cells and hemoglobin, not elastin.

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A fibrous protein that transports oxygen

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