Human Skin Structure and Function

Human skin, though seemingly delicate, is a complex protective barrier made of keratin scales, similar to those of pangolins. It regenerates daily, with new cells forming a waterproof shield against microbes. While skin protects against microscopic threats, the brain helps avoid larger dangers.

How does human skin compare to the protective coverings of animals like armadillos and pangolins?

• It is not protective at all.

• It is thicker and more durable.

• It is made of a different material.

• It is thinner but still provides protection.

What protein is responsible for the formation of human skin scales?

• Melanin

• Keratin

• Elastin

• Collagen

How often does the human body produce a new layer of skin scales?

• Every day

• Once a week

• Every hour

• Every month

What is the role of stem cells in the epidermis?

• They remove dead skin cells.

• They provide color to the skin.

• They produce new skin cells.

• They create sweat.

What happens to skin cells as they reach the surface of the skin?

• They become softer.

• They change color.

• They multiply rapidly.

• They destroy themselves to form a barrier.

How does the outermost layer of skin protect against microbes?

• By being alkaline

• By being neutral

• By being acidic

• By being basic

What is the thickness of the outermost layer of skin compared to?

• A layer of cloth

• A sheet of metal

• A piece of plastic wrap

• A piece of paper

What is the primary function of the fats released by skin cells?

• To produce sweat

• To provide energy

• To fill spaces between cells

• To create color

What role does the brain play in protection compared to the skin?

• It helps avoid larger predators.

• It helps avoid dehydration.

• It helps avoid microscopic threats.

• It helps avoid physical injuries.