The skin carries out the first step in the synthesis of vitamin D
Living keratinocytes exfoliate from the epidermis as tiny specks called dander
The deeper of the two layers of the skin is the hypodermis
The youngest keratinocytes are found in the stratum basale
Melanin, hemoglobin, and carotene give color to the skin
Albinism is the genetic lack of melanin that results in a milky white coloration of the skin.
Embarrassment can be perceived by an abnormal coloration of the skin called cyanosis
Freckles are elevated patches with an abnormal coloration of the skin
Straight hair is round, wavy hair is oval, and curly hair is relatively flat
Hair and nails are composed of collagen
Merocrine sweat glands are associated with hair follicles in the pubic and anal regions, axilla, areola, and beard.
Pattern baldness is relatively rare in women because women have lower testosterone levels than men.
The acidity of sweat contributes to the acid mantle that inhibits bacterial growth in the skin.
Debridement is not necessary to infection control
The three forms of skin cancer are defined by the types of cells in which they originate.
The skin does not include
These are all types of cells found in the epidermis except
Skin covering the __________ has sweat glands but no hair follicles or sebaceous (oil) glands.
1 to 2
Most of the skin is ___________ mm thick
This image shows structures of the skin and subcutaneous tissue. What does "3" represent?
This image shows structures of the skin and subcutaneous tissue. What does "1" represent?
Collagen and fibroblasts
This image shows structures of the skin and subcutaneous tissue. ________ are found in the layer of the skin represented as "2".
stratified squamous epithelium; dense irregular connective tissue
This image shows structures of the skin and subcutaneous tissue. Layer "1" represents _____, whereas layer "2" represents ___________.
This image shows strata and cell types of the epidermis. ________ represents a living keratinocyte belonging to the stratum basale
living keratinocyte; melanocyte
This image shows strata and cell types of the epidermis. "2" represents a _________, whereas "4" represents a _________.
This layer of the epidermis consists of up to 30 layers of dead cells
tactile (Merkel) cells
Which of the following are associated with the sense of touch?
The fastest rate of mitosis happens in the
dendritic (Langerhans) cells
These cells stand guard against toxins, microbes and other pathogens.
Fingerprints left on things we touch are associated with
Calluses or corns are the result of accelerated multiplication of
The ___ is absent from most epidermis
. Leather is mostly made of the __________ layer of the dermis, which is very tough due to the high concentration of ____________ fibers
Hypodermis is usually has an abundance of in this tissue
The skin discoloration most likely to suggest physical abuse is
The reddish color of the skin of the lips is primarily due to this pigment
This skin color is most likely to result from anemia
Bilirubin causes a skin discoloration called
quantity of melanin produced
Ethnic differences in skin color are primarily caused by differences in
A ___ is an elevated patch of melanized skin.
A pilus is
The hair present only prenatally is called ___________, most of which is replaced by ____________ by the time of birth.
The _________ provides the hair with its sole source of nutrition
This image shows the structure of a hair and its follicle. What does "1" represent?
hairs to stand on end with no apparent function.
The contraction of the piloerector muscles (pilomotor muscle or arrector pili) in humans causes
anagen, catagen, and telogen.
A hair cycle consists of three developmental stages in the following order
Each hair grows in an oblique epithelial tube called a(an)
Excessive hairiness is called
The narrow zone of dead skin overhanging the proximal end of a nail is called
This image shows the anatomy of a fingernail. What does "2" represent?
eumelanin and pheomelanin.
Variations in hair color arise from the relative amounts of
Mitosis in the __________ accounts for growth of the nail.
The oil of your scalp is secreted by __________ glands associated with the hair follicles.
Secretions from __________ glands contribute the acid mantle that inhibits bacterial growth on the skin.
____________ is/are formed partly from the secretions of glands in the external ear canal.
This image shows cutaneous glands. The name of structure "1" is
The cutaneous glands concerned with cooling the body are
The ___ are a source of sex pheromones
Mammary glands are modified ___________ glands that develop within the female breast, whereas ____________ are present in both sexes
spinosum and basale
Which two strata of the epidermis are most susceptible to cancer?
asymmetry, border irregularity, color, and diameter
The "ABCD rule" for recognizing early signs of malignant melanoma refers to the following characteristics of the lesion
The least common but most deadly type of skin cancer is
Basal cell carcinoma initially affects cells of the stratum __________, whereas malignant melanoma arises from ___________.
_____________ burns involve the epidermis, all of the dermis, and often some deeper tissue.
The most immediate threat to the life of a patient with severe burns is