Skin SciencesCâu 47 / 100
How do UVA and UVB rays differ in their effect on skin?
a.UVA penetrates more deeply and contributes to aging and pigmentation, while UVB primarily affects the epidermis and causes sunburn
b.UVB penetrates the dermis and UVA cannot reach the skin
c.UVA is blocked by window glass while UVB passes through freely
d.Only UVB contributes to skin cancer risk
Giải thích
UVA has a longer wavelength that reaches the dermis and drives photoaging and pigment changes, while shorter UVB rays are the main cause of burning at the epidermal level. UVA passes through window glass more readily than UVB, not the reverse. Both wavelengths contribute to skin cancer risk, which is why broad-spectrum protection is recommended.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Which of the following is a secondary skin lesion?
- During skin analysis the esthetician notices a mole with irregular, notched borders, uneven color, and a diameter larger than a pencil eraser that the client says has recently changed. What is the correct action?
- Which client history item is a general contraindication that should prompt the esthetician to obtain physician clearance before treatment?
- Which pair correctly separates intrinsic from extrinsic aging?
- During which phase of the hair growth cycle is waxing most effective?
- A client reports coarse dark hair growth on the chin and upper lip that began after a hormonal change. Which term describes this pattern in a female client?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California Esthetician Written Licensing Exam · Quy trình kiểm tra