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Prep 08 Practice Test #1 Critical Reasoning (54 Questions)
Which of the following most logically compl
-It does maintain itself, but rapid regeneration of connective tissue in the dermis
occurs only during unusual circumstances, as in the healing of wounds.
-In the healing of a wound such as a surgical incision, fibroblasts in the dermis
-In addition to protection from microbiological entry, chemical hazards, and
mechanical trauma, the skin also protects us from dehydration caused by loss of
internal body fluids and from unwanted entry of fluids from the external
Blood and Skin
-The blue coloration results from the fact that hemoglobin changes from a bright
red color to a deep maroon red color when it loses oxygen and gains carbon
-Light reflecting from the dark red hemoglobin and diffused by fibers in th
The epidermis is composed of several types of epithelial cells.
-Keratinocytes eventually become filled with at rough, fibrous protein called
-These cells, arranged in distinct strata, or layers, are by far the most important
cells in t
Layers of the Skin
-Stratum lucidum a few layers of squamous cells filled with eleidin a keratin
precursor that gives this layer a translucent quality.
-Stratum granulosum 2-5 layers of dying, somewhat flattened cells filled with
darkly staining keratohya
-The thin epidermal layer of the skin conforms tightly to the ridges of dermal
-As a result, the epidermis also has characteristic ridges on its surface.
-Epidermal ridges are especially well defined on the tips of the fingers an
-It is the amount and type of melanin pigment actually produced by these cells
that account for the majority of skin color variations.
-Two groups of melanin are made by the melanocytes of the body.
Heredity is a major fact
-The specific chemical composition of surface film is variable, and samples taken
from skin covering one body area of ten have a different mix of chemical
components than film-covering skin in another area does.
-This difference helps explain
-Vital, diverse, complex, extensive these adjectives describe the bodys largest,
thinnest, and one of its most important organs, the skin.
-It forms a self-repairing and protective boundary between the internal
environment of the body and an often-ho
-The junction glues the two layers together and provides mechanical support for
the epidermis, which is attached to its upper surface.
-The DEJ serves as a partial barrier to the passage of some cells and large
-Certain dyes, if inj
-Increasing age may also influence melanocyte activity.
-Apoptosis of monocyte stem cells in hair follicles produces the graying of the
hair often associated with age.
-Cumulative exposure to UV radiation over the years can also trigger exces