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Chapter 5 sections 1,2,8,9
Terms in this set (44)
Which structure represents when skin cannot slide easily to accommodate joint movement causing the dermis to fold and crease?
Melanoma is particularly dangerous because __________.
it grows rapidly and metastasizes
Which structure represents lines that are important to surgeons because when an incision is made parallel to these lines, the skin gapes less and heals more readily?
body with lines on it
Which structure represents tearing of the dermis, leaving silvery white scars called striae?
Match the following skin functions with the mechanism that accomplishes them: Metabolic functions
Synthesis of vitamin D; destruction of cancer-causing chemicals; activation of some steroid hormones
Identify the following type of skin cancer indicated by B in the photographs below. (pic of flat red/pink spot)
Squamous cell carcinoma
Which of the following is not a function of the skin?
Respiratory gas exchange
Match the following cells with their function: Tactile cells
Match the following component of the ABCDE rule for recognizing melanoma with its description: Diameter
Larger than 6mm
Match the following form of skin cancer with its description: Melanoma
The "most dangerous form" of skin cancer because it is highly metastatic; can originate wherever there is pigment, but often arises from existing moles, metastasizing rapidly into surrounding circulatory vessels
Which of the following is not true concerning sun exposure?
it temporarily stimulates the immune system
Match the following component of the ABCDE rule for recognizing melanoma with its description: Evolution
changes with time
What type of mole or pigmented spot on the skin would be the most concerning?
a spot with varying colors and irregular borders
Match the following component of the ABCDE rule for recognizing melanoma with its description: Border irregularity
Pigmented spot possesses notches and indentations
Identify the following type of skin cancer indicated by C in the photographs below. (Black spot by ear)
Match the following skin function with the mechanism that accomplishes it: Rising body temperature regulation
Dilation of blood vessels and secretion of sweat that evaporates from body surface
Match the following skin functions with the mechanism that accomplishes it: Blood reservoir
Potential to hold about 5% of the body's blood volume in numerous blood vessels
Identify the following type of skin cancer indicated by A in the photographs below. (spot on nose)
Basal cell carcinoma
Skin appendages like hair and hair follicles, nails, sweat glands, and sebaceous (oil) glands each plays a unique role in which of the following?
In which layer are 10-25% of the cells melanocytes, a cell that is prone to cancer in the form of melanoma?
Match the following epidermal cell type with its function: Keratinocytes
Produce a tough fibrous protein that gives the epidermis most of its protective qualities
Which of the following epidermal components possesses a waterproofing glycolipid that functions in preventing water loss?
Which letter represents where the stratum lucidum would be found in fingertips, palms, and the soles of the feet?
B (between corneum and granulosum)
Match the following cells with their function: Dendritic (Langerhans) cells
Activate the immune system
One main difference between thin skin and thick skin is that __________.
in thin skin, the stratum lucidum appears to be absent
Match the following skin strata with its description: Stratum spinosum
Several cell layers thick, with intermediate filaments, keratinocytes and dendritic (Langerhans) cells
Match the following skin function with the mechanism that accomplishes it: Protection
Provides a chemical barrier and a physical barrier to ward off bacterial invasion and to provide "waterproofing"
Match the following epidermal cell type with its function: Merkel cells
Sensory receptors for touch
An injection is administered through the skin using a hypodermic needle. Identify the first integumentary structure through which the needle will pass.
Which of the following is not a function of hair?
Hair provides a luxuriant source of warmth.
Match the following skin strata with its description: Stratum granulosum
One to five layers of flattened keratinocytes with keratohyaline and lamellated granules
The epidermis is composed of which of the following tissues?
Keratinized stratified squamous epithelial tissue
Match the following skin strata with its description: Stratum corneum
Many cell layers of dead keratinocytes filled with keratin (outermost epidermal layer)
Keratinocytes are connected by desmosomes, especially in the stratum spinosum. Recall the function of desmosomes.
Desmosomes serve as anchoring junctions—mechanical couplings scattered like rivets along the sides of adjacent cells to prevent their separation.
Which of the following lists the layers of the epidermis in thick skin in the correct order from deep to superficial?
Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum
Which of the following cells function as sensory receptors for touch?
Match the following epidermal cell type with its function: Melanocytes
responsible for skin pigmentation
The most common (and least malignant) type of cancer arises the layer marked by which letter?
Choose the false statement.
Skin does not have a role in regulating body temperature.
Which of the following structures are primarily responsible for fingerprints?
friction ridges and sweat pores
Exposure to UV radiation may damage folate that circulates in the blood within skin. Folate is an important B vitamin that is important for the reduction in neural tube defects in pregnant women.
All of the following shield the body from UV rays except __________.
the acid mantle
Match the following skin strata with its description: Stratum lucidum
A thin, translucent band consisting of a two to three rows of clear, flat, dead, keratinocytes
Match the following cells with their function: Keratinocytes
Make a fibrous protein for skin protection
Match the following skin strata with its description: Stratum basale
Single row of cells mainly composed of keratinocyte stem cells.
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