What is formed when sebum produced by the oil glands mixes with the body's perspiration?

What is formed when sebum produced by the oil glands mixes with the body's perspiration?

• A. Medulla
• B. Acid mantle
• C. Arrector pili
• D. Sebaceous glands

Answer: (B)

The main idea is the protective film on the skin formed by mixing oil with sweat. When sebum from oil glands combines with body perspiration, it creates the acid mantle, a thin, slightly acidic layer that coats the skin’s surface. This film helps shield against bacteria and environmental factors while helping to keep the skin moisturized and maintain a slightly acidic pH (roughly around 4.5–5.5). The other terms refer to different structures: the medulla is part of a hair shaft, the arrector pili is the tiny muscle that makes hair stand up, and sebaceous glands are the oil-producing glands themselves, not the film formed by their secretions mixing with sweat.

The main idea is the protective film on the skin formed by mixing oil with sweat. When sebum from oil glands combines with body perspiration, it creates the acid mantle, a thin, slightly acidic layer that coats the skin’s surface. This film helps shield against bacteria and environmental factors while helping to keep the skin moisturized and maintain a slightly acidic pH (roughly around 4.5–5.5). The other terms refer to different structures: the medulla is part of a hair shaft, the arrector pili is the tiny muscle that makes hair stand up, and sebaceous glands are the oil-producing glands themselves, not the film formed by their secretions mixing with sweat.