Chap 5 Quiz

Variations in hair color reflect differences in the pigment produced by? -dermal papillae. -melanocytes. -keratinocytes. -soft keratin. -carotene cells.

The stratum corneum just under the free-edge of a nail is the? -nail root. -eponychium. -lunula. -hyponychium. -cuticle.

Merocrine sweat glands? -produce organic secretions that are metabolized by bacteria to produce body odor. -secrete a watery fluid directly onto the surface of the skin. -primarily function in lubricating the hairs. -increase in number and activity with aging. -are compound alveolar glands.

The tough "horny" superficial layer of the epidermis is known as the? -stratum lucidum. -stratum granulosum. -stratum germinativum. -stratum corneum. -stratum spinosum.

All of the following are true of epidermal ridges, except that they? -contain increased numbers of free nerve endings. -interconnect with the dermal papillae. -produce patterns that are determined genetically. -extend into the dermis. -cause ridge patterns on the surface of the skin.

The layer of stem cells that constantly divide to renew the epidermis is the? -stratum granulosum. -stratum corneum. -stratum germinativum. -papillary layer. -basal lamina.

________ are cells in the epidermis that are part of the immune system? -Melanocytes -Dendritic cells -Merkel cells -Squamous cells -Basal cells

The cuticle around a nail is the? -perinychium. -hyponychium. -lunula. -eponychium. -free edge.

The layer of the skin that contains the blood vessels and nerves that are closest to the surface of the skin is the ________ layer? -hypodermal -papillary -epidermal -subcutaneous -reticular

The layer of the epidermis that contains abundant desmosomes is the? -stratum granulosum. -stratum germinativum. -stratum lucidum. -stratum corneum. -stratum spinosum.

Wrinkles in elderly individuals are the result of? -loss of elastic filaments in the reticular layer of the dermis. -decreased thickness of the dermis. -the loss of glands and hair follicles from the skin. -increased production of epidermis. -increased keratinization of the epidermis.

All of the following are true of perspiration produced by merocrine sweat glands, except that it? -helps cool the body when it evaporates. -is more than 99 percent water. contains electrolytes and waste products. -produces the body odor characteristic of "sweating." -helps to prevent bacteria from colonizing the skin.

________ are cells in the epidermis that are part of the immune system? -Melanocytes -Dendritic cells -Merkel cells -Squamous cells -Basal cells

the ________ in keratinocytes protects the epidermis and dermis from the harmful effects of sunlight? -keratin -carotene -hemoglobin -sebum -melanin

The layer of the skin that contains bundles of collagen and elastic fibers responsible for the strength of the skin is the ________ layer? -hypodermal -epidermal -subcutaneous -papillary -reticular

Sensible perspiration is produced by ________ glands? -merocrine sweat -apocrine sweat -sebaceous -ceruminous -mammary

The ________ glands in the axilla become active at the time of puberty? -axillary -apocrine sweat -ceruminous -merocrine sweat -sebaceous

Large quantities of keratin are found in the epidermal layer called the? -stratum lucidum. -stratum germinativum. -stratum spinosum. -stratum granulosum. -stratum corneum.

The layer of the skin that contains the blood vessels and nerves that are closest to the surface of the skin is the ________ layer? -hypodermal -papillary -epidermal -subcutaneous -reticular

The two components of the integumentary system are the? -epidermis and superficial fascia. -integument and hypodermis. -epidermis and dermis. -cutaneous membrane and hypodermis. -cutaneous membrane and accessory structures.