Thick skin __________. (One or more answers are correct. Click on all correct answers for full credit.)
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1. has a thicker stratum granulosum and stratum corneum than thin skin
2. contains an additional layer (stratum)
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What is the importance of vitamin D synthesis in the epidermis?
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Vitamin D is required for the uptake of calcium from the diet, and thus is important to healthy bones.
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Which of the following statements is true concerning skin pigmentation?
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Melanin may be yellow, brown, or black, which contributes to differences in skin pigmentation among different groups of people.
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Which of the following statements is correct regarding Melanocytes? They __________.
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respond to UV radiation by increasing production of melanin
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Which of the following is a characteristic of the hypodermis?
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It is distributed differently in males and females
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The most external layer of a hair shaft is the
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CUTICLE
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Pimples begin
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when sebaceous glands become blocked by sebum
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Tattoos are permanent because
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the pigments are injected in the dermis
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In the ABCD rule of skin cancer, the letter B stands for
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border
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The only cell type found superficial to the stratum spinosum in the epidermis is the
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keratinocyte
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Skin is our largest organ, accounting for about __________ percent of total body weight
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7
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Which statement is FALSE concerning the skin's role in protection?
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A-The skin protects the body from invading microorganisms.
B- Cells in the dermis produce pigments that protect the skin from harmful ultraviolet radiation.
C- The skin insulates the body's deeper organs.
D- The epidermis is waterproof, preventing unnecessary water loss.
ANSWER IS B
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Apocrine sweat glands are distinguished by which of the following?
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They are confined to the genital, axillary, and anal regions.
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Which of the following is an accurate description of sweat?
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Filtrate of blood, released by exocytosis, contains metabolic wastes.
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Which layer of the integument are toenails and fingernails derived from?
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epidermis
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The lunule, which represents the thickest part of the nail matrix is found at the
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proximal part of the nail bed
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Which is the most abundant and widespread type of sweat gland?
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eccrine
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The black part of a blackhead is
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oxidized sebum
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The white half-moon visible under the proximal part of a fingernail is the
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lunule
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Goose bumps" on the skin are due to action of the
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arrector pili muscles
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The type of skin cancer that arises from keratinocytes of the stratum spinosum is
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squamous cell carcinoma
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A partial-thickness burn involves
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the epidermis and papillary layer of the dermis.
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Sebaceous glands secrete oil onto the surface of the epidermis via the hair follicle
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true
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Ceruminous glands of the ear canal are modified sebaceous glands.
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false
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Any condition involving absence or loss of hair is called
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alopecia
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The appearance of wrinkles in skin with age is largely due to changes in the
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collagen and elastic fibers in the dermis.
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If a woman was burned on her entire anterior right upper limb and her entire anterior right lower limb, approximately what percentage of her body was burned?
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13.5
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