Hair & Scalp SciencesCâu 70 / 100
Sebum, which lubricates the hair and skin, is produced by the:
a.Sweat glands
b.Arrector pili muscle
c.Dermal papilla
d.Sebaceous (oil) glands
Giải thích
The sebaceous glands secrete sebum, an oily substance that lubricates and protects the skin and hair. Overactivity can cause oily scalp conditions, while underactivity leads to dryness.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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