Skin can regenerate effectively even after considerable damage occurs because .....Select one:a. cells of the stratum basale cannot migrate to other positions in the skin.b. stem cells persist in both epithelial and connective-tissue components of the skin even after injury.c. contraction in the area of the injury brings cells of the adjacent strata together.d. fibroblasts in the dermis can give rise to new germinal cells in the epidermis.e. the epidermis of the skin has a rich supply of small blood vessels.

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The effects of aging on the skin includeSelect one:a. thickening of the epidermis.b. a decline in the activity of sebaceous glands.c. an increased number of sweat glands.d. an increased blood supply to the dermis.e. increased production of vitamin D.
The ___________ in keratinocytes protects the epidermis and dermis from the harmful effects of sunlight.Select one:a. melaninb. sebumc. carotened. keratine. hemoglobin
The type of cells that form the strata in the epidermis areSelect one:a. dendritic cells.b. fibroblasts.c. melanocytes.d. keratinocytes.e. adipocytes.
A surgical incision parallel to the lines of cleavageSelect one:a. closes and heals with relatively little scarring.b. heals slower than incisions made perpendicular to the lines of cleavage.c. does not affect the healing process.d. has a tendency to reopen.e. requires no sutures.
Scar tissue is the result ofSelect one:a. increased numbers of epidermal layers in the area of the injury.b. a lack of sebaceous glands in the injured area.c. increased numbers of fibroblasts in the injured area.d. a thickened stratum basale in the area of the injury.e. large numbers of collagen fibers and relatively few blood vessels in the injured area.
Which of the following statements about rickets is not true?Select one:a. prevented by sunlightb. leads to skeletal deformityc. is usually geneticd. prevented by vitamin De. leads to weak bones
The primary pigments contained in the epidermis areSelect one:a. carotene and xanthophyll.b. xanthophyll and melanin.c. carotene and melanin.d. melanin and chlorophyll.e. melanin and chromatin.
Epidermal growth factor exerts which of these effects on the epidermis?Select one:a. stimulates keratin synthesis.b. promotes cell divsionc. accelerates tissue repaird. speeds up glandular functione. All of the answers are correct.
An albino individual lacks the ability to produceSelect one:a. perspiration.b. eleidin.c. carotene.d. melanin.e. keratin.
Which of the following happens if body temperature rises above normal?Select one:a. The activity of melanocytes increases.b. Circulation in the skin decreases.c. Sweat gland activity decreases.d. Blood flow to the skin increases.e. Evaporative cooling stops.

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The following are stages in the regeneration of skin following an injury.1. blood clot/scab formation2. cellular migration3. epidermis covers granulation tissue4. epidermis covers scar tissueThe correct order for these events is:Select one:a. 3,4,1,2b. 1,2,3,4c. 4,3,2,1d. 4,3,1,2e. 2,4,1,3
__________ sweat glands are widely distributed across the body surface, _____________ glands are located wherever hair follicles exist, and __________ sweat glands are found only in a few areas.Select one:a. Apocrine; merocrine; sebaceousb. Sebaceous; merocrine; apocrinec. Merocrine; sebaceous; apocrined. Merocrine; aprocrine; sebaceouse. Apocrine; sebaceous; merocrine
The layer of the skin that contains the blood vessels and nerves that are closest to the surface of the skin is the ______________ layer.Select one:a. reticularb. papillaryc. hypodermald. epidermale. subcutaneous
Each of the following is a function of the integumentary system, exceptSelect one:a. excretion of salts and wastes.b. synthesis of vitamin C.c. protection of underlying tissue.d. provision of sensation.e. maintenance of body temperature.


Hole"s Essentials of Human Anatomy & Physiology12th EditionDavid N. Shier, Jackie L. Butler, Ricki Lewis


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