A&P Chapter 5 Quiz
A hematoma in the skin appears as __________
A hematoma caused by the clotting of blood under the skin appears as black and blue marks or bruises
An injection is administered through the skin using a hypodermic needle. Identify the first integumentary structure through which the needle will pass
A hypodermic needle would first pass through the superficial layer of the skin, the epidermis. It would then pass through the two layers of the dermis, the papillary layer and the reticular layer, before penetrating the hypodermis
Which integumentary gland is believed to function as a sexual scent gland?
Apocrine glands start to function at puberty under the influence of androgens
Which of the following statements is NOT true of apocrine sweat glands and sebaceous glands?
Apocrine sweat glands are concentrated in the axillary and anogenital regions, while sebaceous glands are widely distributed over most of the body
Which of the following are NOT considered critical burns?
First-degree burns are not considered critical because they typically heal in a few days without any special attention
Keratinocytes in the stratum spinosum are known as __________
Keratinocytes in the stratum spinosum are known as prickle cells because of their spiny appearance under the microscope from an artifact produced by staining where desmosomes become more apparent
Which of the following cells would NOT be present in the dermis?
Keratinocytes. As is typical with connective tissue, the dermis possesses mast cells, fibroblasts, macrophages, and scattered white blood cells
Which of the following cells is part of the immune system?
Langerhans cell, which is a fixed macrophage
What is the only pigment synthesized in the skin?
Melanin, synthesized by melanocytes in the deepest layer of the epidermis, is present in several varieties, ranging from yellow to reddish to brown to black
Which of the following cells function as sensory receptors for touch?
Merkel cells function as sensory receptors for touch
Which of the following conditions would NOT be seen from overexposure to UV light?
Overexposure to UV light will depress the immune system
Which of the following is NOT a function of the skin?
Respiratory gas exchange
Sebaceous glands belong to which of the following classes?
Sebaceous glands are simple branched alveolar glands with several alveoli opening into a single duct
Sebaceous glands are located in all of the following areas EXCEPT the __________.
Sebaceous glands occur over the entire body, with the exception of the palms and soles of the feet
Skin eruption produced by dilated small blood vessels of the face, especially on the nose and cheeks, is descriptive of which skin disorder?
Skin eruption produced by dilated small blood vessels of the face may indicate rosacea, especially when it appears to worsen in conjunction with intake of alcohol, spicy foods, or after a hot bath or sun exposure
What type of skin cancer affects cells of the stratum spinosum?
Squamous cell carcinoma, the second most common skin cancer, arises from the keratinocytes of the stratum spinosum
Which of the following is the correct sequence of epidermal layers of thick skin, from deep to superficial?
Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum
Striae in the skin are caused by __________
Striae in the skin are due to dermal tears
Which of the following structures are primarily responsible for fingerprints?
Sweat pores open along the crests of the epidermal ridges, leaving distinct fingerprints on touched surfaces
Terminal hair is located in all of the following areas EXCEPT the __________.
The body hair of women and children is the fine, short, vellus variety, while the adult male's body hair is the terminal variety
The reticular layer of the dermis is composed of which tissue type?
The deeper reticular layer, which accounts for about 80% of the thickness of the dermis, is composed of dense irregular connective tissue
The epidermis develops from which embryonic germ layer?
The epidermis develops from the embryonic ectoderm
Adipose tissue is concentrated in which of the following layers?
The hypodermis acts as an insulator because it contains a substantial quantity of adipose tissue
Which of the following is NOT strictly a component of the integumentary system?
The hypodermis, deep to the skin, shares some of the skin's functions, but it is not a part of the integumentary system
Which of the following epidermal components possess(es) a waterproofing glycolipid that functions in preventing water loss?
The lamellar granules contain a waterproofing glycolipid that is secreted into the intercellular space and is the major factor in slowing water loss across the epidermis
Which of the following layers of skin is avascular and relies on capillaries in the underlying connective tissue to provide nutrients?
The stratum basale of the epidermis is avascular and has to obtain nutrients from the vasculature in the underlying connective tissue of the dermis
Which of the following strata is NOT visible as a distinct layer in thin skin?
The stratum lucidum appears in thick skin, but it is not visible as a distinct layer in thin skin
The epidermis is composed of which of the following tissues?
The superficial layer of the skin, the epidermis, is composed of thick keratinized stratified squamous epithelium
Which of the following thick skin strata is the thickest?
The superficial stratum corneum is many cell layers thick, much thicker than any other epidermal layer
What is the primary function of melanin?
To provide protection against the sun's UV rays
