NIC Esthetician Written ExamScientific ConceptsEasy
An esthetician is explaining the importance of broad-spectrum sunscreen to a client. They emphasize that while UVA rays contribute to aging, UVB rays are primarily responsible for which of the following immediate skin responses?
- AHyperpigmentation and melasma
- BBreakdown of collagen and elastin
- CDeep wrinkles and sagging
- DSunburn and skin cancer
Show answer & explanationAnswer & explanation
Correct answer: D. Sunburn and skin cancer
UVB rays are the primary cause of sunburn and are a major contributor to the development of skin cancer, as they directly damage DNA in skin cells.
Why the other options are wrong
- A. Hyperpigmentation and melasma can be triggered by both UVA and UVB, but UVA often plays a larger role in chronic pigment issues.
- B. Breakdown of collagen and elastin is largely attributed to UVA radiation, which penetrates deeper into the dermis.
- C. Deep wrinkles and sagging are primarily associated with UVA exposure, which degrades collagen and elastin over time.
UVB Rays
Ultraviolet B radiation, a shorter wavelength of UV light that primarily affects the epidermis, causing sunburn and increasing the risk of skin cancer.
- Strongest between 10 AM and 4 PM.
- Does not penetrate as deeply as UVA.
- Primary cause of DNA damage leading to skin cancer.
Memory trick: B burns, A ages.