Skin is protected by a thick,oily substance called _____.
A) sebum
B) keratin
C) melanin
D) mucus

Question

Skin is protected by a thick,oily substance called _____.​
A) ​sebum
B) ​keratin
C) ​melanin
D) ​mucus

Quizplus · Accepted Answer

Sebum is a thick, oily substance produced by sebaceous glands in the skin. It helps to lubricate and waterproof the skin, providing a barrier against environmental damage and preventing loss of moisture. Keratin is a protein found in the outer layer of skin, hair, and nails, but it doesn't protect skin from external damage. Melanin is a pigment that gives color to the skin, but it doesn't act as a protective barrier. Mucus is a slimy substance produced by mucous membranes in the body, which helps to trap and remove pathogens, but it's not found in the skin.

Skin Is Protected by a Thick,oily Substance Called _____