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41 Cards in this Set
- Front
- Back
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Which of the following statements indicates the way in which the body's natural defenses protect the skin from the effects of UV damage?
A) Prolonged exposure to the sun induces melanin dispersion, which in turn acts as a natural sunscreen. B)The skin is protected by the synthesis of three pigments that contribute to the skin's color. C) The skin is protected by increasing the number of epidermal dendritic cells, which help to activate the immune system. D)Carotene,which accumulates in the stratum corneum and hypodermal adipose tissue,is synthesized in large amounts in the presence of sunlight. |
Prolonged exposure to the sun induces melanin dispersion, which in turn acts as a natural sunscreen.
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Although the integument is a covering, it is by no means simple, and some of its functions include_____.
A)cooling the body by increasing the action of sebaceous glands during high-temperature conditions B)the dermis providing the major mechanical barrier to chemicals,water,and other external substances. C)epidermal blood vessels serving as a blood reservoir D)resident macrophage-like cells whose function is to ingest antigenic invader and present them to the immune system. |
resident macrophage-like cells whose function is to ingest antigenic invaders and present them to the immune system.
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Epithelia tissue_____.
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has a basement membrane
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In addition to protection (physical and chemical barrier), the skin serves other functions. Which of the following is another vital fuction of the skin?
A)The cells of the epidermis store glucose as glycogen for energy. B)It aids in the transport fo material throughout the body. C)It converts modified epidermal cholestrol to vitamin D precursor important to calcium metabolism. D) it absorbs vitamin C so that the skin will not be subject to diseases. |
It converts modified epidermal cholestrol to vitamin D precursor important to calcium metabolism.
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Mesenchymal cells are most commonly found in _____connective tissue.
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embryonic
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Which of the following statement best describes what fingernails actually are?
A)fingernails are modification of the epidermis B)Fingernails are derived from ossesous tissue C)fingernails are separate from the skin,formed from a different embryonic layer. D)fingernails are extensions of the carpal bones. |
fingernails are modification of the epidermis
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The ______gland is a modified sudoriferous gland that secretes wax.
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ceruminous
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How is hyaline cartilage different from elastic or fibrocartilage?
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Fibers are not normally visible.
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Aprocrine galnds, which begin to fuction at puberty under hormonal influence, seem to play little role in thermoregulation. Where would we find these glands in the human body?
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in the axillary and anogenital area
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The papillary layer of the dermis is connective tissue heavily invested with blood vessels. The superficial surface structures are called?
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dermal papillae
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Matix is composed of_____.
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fibers and ground substance
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Select the correct statement regarding adipose tissue.
A)it is composed mostly of extracellular matrix B)Mature adipose cells are highly mitotic C)Its primary fuction is nutrient storage. D)Most of the cell volume is occupied by the nucleus. |
C)its primary fuction is nutrient storage
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The fuction of the root hair plexus to ______.
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allow the hair to assist in touch sensation.
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the shape of the external ear is maintained by______.
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elastic cartilage
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Water loss through the epidermis could cause a serious threat to health and well being, Which of the following protects us against excessive water loss through the skin?
A)The dermis is the thickest protion of the skin and water cannot pass through it. B)Fat associated with skin prevents water loss. C)The size and shape of the cells that make up the stratum spinosum, as well as the thick bundles of intermediate filaments. D)Lamellated granules of the cells of the stratum granulosum , a glycolipid that is secreted into extracellular spaces. |
Lamellated granules of the cells of the stratum granulosum , a glycolipid that is secreted into extracellular spaces.
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The first step in tissue repair involves____.
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inflammation
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Cell types likely to be seen in areolar connective tissue include all except______.
A)mast cells B)macrophages C)chondroytes D)fibroblasts |
chrondrocytes
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Glands,such as the thyroid, that secrete their products directly into the blood rather than through ducts are classified as_____.
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endocrine
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If a splinter penetrated the skin into the second epidermal layer of the sole of the foot, which cells would be damaged?
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lucidum
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Nutrients reach the surface of the skin (epidermis) through the process of______.
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diffusing through the tissue fluid from blood vessels in the dermis.
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The layer that contains the mitotic viable cells of the epidermis.
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Stratum basale
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The layer of the epidermis where desmosomes are found between keratinocytes and where Langerhan's cells are found.
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stratum spinosum
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The layer of the epidermis where the cellsa are considered protective but nonviable.
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Stratum corneum
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Found lining the digestive and respiratory tracts.
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Mucous membrane
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The epithelial membrane lines the closed ventral cavities of the body.
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serous membrane
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Consist of keratinized stratified squamous epithelium.
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Cutaneous membrane
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Functions of connective tissue include binding,support,insulation, and protection.
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true
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Salivary glands exhibit simple tubuloaveolar grandular arrangement.
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False
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Regardless of race, all human beings have about the same number of melanocytes.
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True
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The protein found in large amounts in the outmost layer of epidermal cells is collagen.
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false
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the most dangerous skin cancer is cancer of the melanocytes
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true
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the reason that the nail bed appears pink is the presence of a large numbe of melanocytes in the underlying dermis.
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false
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Goblet cells are found with pseudostratifed ciliated columnar epithelium
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true
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The shock-absorbing pad between the vertebrae are formed of fibrocartilage.
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true
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Blood is considered a type of connective tissue.
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true
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the apocrine sweat glands are fairly unimportant in thermoregulation
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false
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Kidney tubules are composed of ______epithelium.
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cuboidal
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the sebacious glands are classified as a(n) ______exocrine gland because of how their secretion is released.
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holocrine
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the layer of the epidermis immediatly under the struatum lucidium in thick skin is the stratum______.
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Grandulosum
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_______are pigment-producing cells in the epidermis.
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melanocytes
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The course hair of the eyebrows and scalp is called______hair.
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terminal
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