What helps prevent the hair and skin from becoming too dry?

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Multiple Choice

What helps prevent the hair and skin from becoming too dry?

Explanation:
Sebum is the natural oil produced by the sebaceous glands that coats the hair shaft and skin surface. This oily layer acts as a natural conditioner, helping to lock in moisture and form a protective barrier against water loss. By maintaining moisture, sebum prevents the hair and skin from becoming too dry and keeps hair flexible and skin comfortable. The other terms—hair fiber, protofibrils, and primitive hair germ—are structural or developmental components of hair and do not provide lubrication or moisture protection, so they don’t prevent dryness in the way sebum does.

Sebum is the natural oil produced by the sebaceous glands that coats the hair shaft and skin surface. This oily layer acts as a natural conditioner, helping to lock in moisture and form a protective barrier against water loss. By maintaining moisture, sebum prevents the hair and skin from becoming too dry and keeps hair flexible and skin comfortable. The other terms—hair fiber, protofibrils, and primitive hair germ—are structural or developmental components of hair and do not provide lubrication or moisture protection, so they don’t prevent dryness in the way sebum does.

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