Michigan Esthetician State Board Practice Exam

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Study for the Michigan Esthetician State Board Test. Utilize flashcards and multiple choice questions, each featuring hints and explanations. Prepare for success!

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Sunscreens must be what in order to effectively block both UVA and UVB rays?

Narrow spectrum
Reflective
Broad spectrum
Water-resistant

The correct answer is: Broad spectrum

For a sunscreen to effectively block both UVA and UVB rays, it must be labeled as broad spectrum. Broad-spectrum sunscreens contain ingredients that protect against a wider range of the sun’s harmful rays. UVA rays penetrate the skin more deeply, contributing to skin aging and some types of skin cancer, while UVB rays affect the surface of the skin and are primarily responsible for sunburn. A narrow spectrum sunscreen only protects against UVB rays, thereby leaving the skin vulnerable to UVA damage. Reflective sunscreens, while they may provide some level of protection, are not defined by their ability to offer broad-spectrum coverage. Water-resistant sunscreens are designed to stay on the skin for a certain duration, especially when sweating or swimming, but this label does not guarantee broad-spectrum protection. Therefore, the correct choice of broad spectrum ensures comprehensive protection against the full range of harmful UV radiation, making it essential for effective sun safety.