Skin

What is the hypodermis? A) The layer of skin that is not part of the actual skin structure but underneath it. B) The uppermost layer of skin. C) The type of tissue that contains sweat glands. D) The part of the skin responsible for color.

A) The layer of skin that is not part of the actual skin structure but underneath it.

What is a subcutaneous injection? A) An injection administered in the epidermis. B) An injection administered in the hypodermis layer of skin. C) An injection given into muscle tissue. D) An injection applied topically.

B) An injection administered in the hypodermis layer of skin.

What is the main composition of the dermis? A) Fat and fibrous tissue. B) Collagen and fibroblasts. C) Epithelial cells. D) Blood vessels only.

B) Collagen and fibroblasts.

What type of tissue is found in the most superficial layer of the skin (epidermis)? A) Simple squamous epithelium. B) Stratified squamous epithelium. C) Cuboidal epithelium. D) Transitional epithelium.

B) Stratified squamous epithelium.

What does the stratum corneum consist of? A) Living cells that divide. B) Up to 30 layers of dead cells. C) Nerve endings. D) Melanocytes.

B) Up to 30 layers of dead cells.

What is the function of melanocytes? A) To produce collagen. B) To provide nutrients to hair. C) To produce skin color. D) To form the outer layer of skin.

C) To produce skin color.

What is unique about the skin covering fingertips? A) It has hair follicles but no sweat glands. B) It has sweat glands but no hair follicles or sebaceous glands. C) It is thicker than other skin. D) It is completely hairless.

B) It has sweat glands but no hair follicles or sebaceous glands.

What do dendritic (Langerhans) cells do? A) Produce melanin. B) Stand guard against toxins, microbes, and other pathogens. C) Store fat. D) Detect touch.

B) Stand guard against toxins, microbes, and other pathogens.

What are keratinocytes responsible for? A) Sensation. B) Accelerated multiplication that results in calluses or corns. C) Producing sweat. D) Creating hair.

B) Accelerated multiplication that results in calluses or corns.

What type of tissue is abundant in the hypodermis? A) Muscle tissue. B) Adipose tissue. C) Nervous tissue. D) Epithelial tissue.

B) Adipose tissue.

What is melanin? A) The protein in hair. B) The pigment whose quantity produced causes ethnic differences in skin color. C) The color of nails. D) The secretion from sweat glands.

B) The pigment whose quantity produced causes ethnic differences in skin color.

What are dermal papillae? A) Blood vessels in the dermis. B) The structure that provides a hair with its sole source of nutrition. C) Specialized nerve endings. D) Layers of dead skin cells.

B) The structure that provides a hair with its sole source of nutrition.

What are piloerector muscles (arrector pili)? A) Muscles that attach to hair follicles and cause hair to stand on end. B) Muscles responsible for sweating. C) Muscles that help in movement. D) Muscles found in the face.

A) Muscles that attach to hair follicles and cause hair to stand on end.

What is a hair follicle? A) The root structure of the nail. B) The oblique epithelial tube that each hair grows in. C) The area of skin that produces oil. D) The top section of the skin.

B) The oblique epithelial tube that each hair grows in.

What is a lunule? A) The pinkish part of the nail. B) The white opaque 'moon' found at the proximal end of a fingernail. C) The cuticle of the nail. D) The tip of the finger.

B) The white opaque 'moon' found at the proximal end of a fingernail.

What do merocrine sweat glands contribute to? A) Secreting oil. B) The acid mantle inhibiting bacterial growth on skin. C) Muscle movement. D) Blood flow.

B) The acid mantle inhibiting bacterial growth on skin.

What do sebaceous glands secrete? A) Water. B) Sweat. C) The oil found on the scalp. D) Melanin.

C) The oil found on the scalp.

What is a third degree burn? A) Burns that involve only the epidermis. B) Burns that involve the epidermis and dermis. C) Burns that involve the epidermis, all of the dermis, and often some deeper tissue. D) Burns caused by electricity.

C) Burns that involve the epidermis, all of the dermis, and often some deeper tissue.

What is the epidermis? A) The underlying tissue of the skin. B) The uppermost layer of skin that is affected in the genetic disease ichthyosis. C) The fatty layer below the skin. D) The muscle beneath the skin.

B) The uppermost layer of skin that is affected in the genetic disease ichthyosis.

What are desmosomes? A) Skin cells. B) Structures keratinocytes develop to fasten tightly together. C) Substances produced by sweat glands. D) The components of nerves.

B) Structures keratinocytes develop to fasten tightly together.

What is the composition of the epidermis and dermis? A) Stratified squamous epithelial tissue; dense irregular connective tissue. B) Smooth muscle; regular connective tissue. C) Dense fibroelastic tissue; simple cuboidal epithelia. D) Smooth muscle; simple squamous epithelium.

A) Stratified squamous epithelial tissue; dense irregular connective tissue.

What are dendritic cells? A) Cells that produce keratin. B) Phagocytic cells that help trigger an immune response to invading microbes. C) Cells that detect touch. D) Cells that store fat.

B) Phagocytic cells that help trigger an immune response to invading microbes.

What is the dermis? A) The lower layer of nails. B) The layer of skin where features that create fingerprints reside. C) The tissue that connects skin to muscle. D) The outermost layer of skin.

B) The layer of skin where features that create fingerprints reside.

What type of cell is most likely found on a towel after rubbing your skin? A) Fibroblasts. B) Keratinocytes. C) Melanocytes. D) Dendritic cells.

B) Keratinocytes.

What is keratinization? A) The process of skin healing. B) The process in skin that allows it to stay dry and waterproof. C) The processing of nutrients in skin. D) The growth of skin cells.

B) The process in skin that allows it to stay dry and waterproof.

What happens to a wound if fibroblasts are inefficient? A) The wound will heal very quickly. B) The wound will heal very slowly. C) The wound will scar immediately. D) The wound will not heal.

B) The wound will heal very slowly.

Why does Botox reduce excessive sweating? A) It dries out sweat glands. B) Nerve signals that stimulate apocrine and merocrine glands are blocked. C) It increases blood flow to the skin. D) It absorbs moisture.

B) Nerve signals that stimulate apocrine and merocrine glands are blocked.

What happens to a damaged area near the lunula of a fingernail? A) It will turn black. B) The white oval will gradually move out toward the free edge of the nail. C) It heals instantly. D) It grows back thicker.

B) The white oval will gradually move out toward the free edge of the nail.

What types of glands are affected by the miraDry cosmetic procedure? A) Sweat glands and sebaceous glands. B) Apocrine and sweat glands. C) Merocrine (eccrine) and apocrine sweat glands. D) Only sebaceous glands.

C) Merocrine (eccrine) and apocrine sweat glands.