Skin and Hair Anatomy Concepts

Which of the following is NOT considered a primary component of the integumentary system?

• Skin

• Glands

• Hair

• Muscles

What is a key difference between the epidermis and the dermis?

• The epidermis is vascularized, while the dermis is avascular.

• The dermis is made of epithelial tissue, while the epidermis is made of connective tissue.

• The epidermis is avascular and receives nutrients by diffusion, while the dermis is vascularized.

• The dermis is a thinner outer layer, while the epidermis is a thicker inner layer.

What is the primary function of the keratinocytes in the stratum basale layer of the epidermis?

• To ingest foreign substances and activate the immune system.

• To produce melanin for skin pigmentation.

• To rapidly divide and produce new cells to regenerate dead skin.

• To act as sensory receptors for touch.

In which layer of the epidermis does keratinization primarily begin, leading cells to flatten and harden as they die due to insufficient nutrients?

• Stratum Basale

• Stratum Spinosum

• Stratum Granulosum

• Stratum Corneum

Besides melanin, which other pigment molecules contribute to skin color and are mentioned in the video?

• Collagen and Elastin

• Carotene and Hemoglobin

• Keratin and Tonofilaments

• Melanocytes and Dendritic cells

What is the primary component of a hair strand?

• Soft keratin

• Dead keratinized cells

• Living epidermal cells

• Collagen fibers

Which layer of the hair shaft consists of a single layer of overlapping, highly keratinized cells?

• Medulla

• Cortex

• Cuticle

• Hair root

Which part of the hair follicle supplies signals and nutrients to the hair for growth?

• Hair bulb

• Hair shaft

• Hair papilla

• Arrector pili

Which type of sweat gland secretes fat and protein components along with water, salts, and metabolic wastes, contributing to body odor?

• Eccrine sweat gland

• Merocrine sweat gland

• Sudoriferous gland

• Apocrine sweat gland

What is the primary function of sebum secreted by sebaceous glands?

• To cool the body through evaporation.

• To produce earwax.

• To lubricate hair and skin, slow water loss, and kill bacteria.

• To provide nutrients for hair growth.