Understanding Your Skin

What are the three layers of the skin?

• Cutis, Subcutis, Superficialis

• Epidermis, Dermis, Hypodermis

• Cortex, Medulla, Cuticle

• Stratum, Basal, Follicle

What substance in the epidermis makes hair and nails strong?

• Elastin

• Collagen

• Melanin

• Keratin

How often are the cells in the epidermis completely replaced?

• Every 7-9 weeks

• Every 4-6 weeks

• Every 10-12 weeks

• Every 2-3 weeks

What causes the skin to tan?

• Exposure to cold

• Production of melanin

• Lack of hydration

• Eating certain foods

Which layer of the skin is the thickest?

• Epidermis

• Stratum

• Dermis

• Hypodermis

What makes the skin elastic and stretchable?

• Keratin and melanin

• Lymphocytes and macrophages

• Collagen and elastin

• Fibroblasts and phagocytes

Why can't you tickle yourself?

• The brain anticipates the touch and reduces sensitivity

• The brain increases sensitivity

• Nerve receptors are inactive

• The skin is less sensitive to self-touch

What role does fat play in the hypodermis?

• It produces melanin

• It increases skin sensitivity

• It acts as fuel and protection

• It helps in the production of keratin

What happens when a bacterium penetrates all skin layers?

• It causes immediate infection

• It strengthens the skin's immunity

• It becomes part of the skin flora

• Macrophages destroy it

How does scar tissue differ from ordinary skin tissue?

• It has parallel fibers for faster repair

• It is less elastic

• It has more melanin

• It contains more fat cells