Which layer is composed primarily of dense irregular connective tissue? A) A |
C |
Layer B is composed primarily of __________. A) dense regular connective tissue |
areolar connective tissue |
Which of these is NOT a function of the layer at D? A) to insulate the body from heat loss |
to supply cells to replace those lost from the epidermis |
What is the function of the secretion from A? A) to lubricate hair and prevent infection |
to lubricate hair and prevent infection |
Which structure is a type of sweat gland? A) A |
C |
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The skin is permeable to organic solvents, such as acetone or turpentine, because they ______. A) can dissolve the lipid bilayers of epidermal and dermal cell plasma membranes |
can dissolve the lipid bilayers of epidermal and dermal cell plasma membranes |
The source of the fluid that accumulates in a blister is________. A) water that is absorbed from the environment into the skin |
the plasma of the blood flowing through the numerous dermal blood vessels |
During cold weather, blood vessels located in the dermis undergo vasoconstriction restricting blood flow into the skin. This produces additional body heat by routing blood to what effector organ? A) cardiac muscle |
skeletal muscle |
A Caucasian patient with pale skin is treated for low blood pressure with medication that elevates the blood pressure; however, the skin’s pallor does not change. Which of the following is the most likely cause of the pallor in this patient? A) respiratory disease that results in the blood being poorly oxygenated |
Anemia |
If a large number of whiteheads appear on the skin of the forehead, which of the following would result? A) fine hairs on the forehead would become brittle |
all of the above |
Layers B and C collectively form the _________. A) epidermis |
dermis |
Which of the following terms describes layer D? A) epidermal |
subcutaneous |
Which of the following correctly describes a common feature of all structures labeled A through D in the figure? A) Structures A, B, C, and D are located in the dermis. |
Structures A, B, C, and D are located in the dermis. |
Which of these glands is properly matched with its mode of secretion? A) A; holocrine |
A; holocrine |
What is the function of structure B? A) production of defensive chemicals |
detection of pressure stimulus |
What is the most common cell type in the epidermis? A) dendritic cells |
keratinocytes |
Cell division would be most common among cells in which of the labeled layers? A) A |
D |
What feature of the prickle cells in layer C causes them to have pointy projections after tissue preparation? A) the rigidity of the cell membrane |
their desmosome attachments |
Which of these epidermal layers would be LEAST likely to develop cancer? A) A |
A |
Which of the following is NOT a layer of the epidermis? A) stratum corner |
reticular layer |
Which of the following statements is INCORRECT? A) Keratinocytes produce a fibrous protein to protect the epidermis. |
Tactile cells anchor the skin to the body. |
Keratin protects skin cell DNA from the damaging effects of ultraviolet (UV) radiation. Is this statement true or false? A) True |
False |
Surface skin cells regenerate from stem cells found in which specific region? A) in the stratum basal |
in the stratum basal |
Which of the following layers is found only on the palms of the hands or the soles of the feet? A) stratum lucid |
stratum lucid |
The integument’s ability to resist tearing when stretched is largely due to the ________. A) desmosomes that bind together the cells of the stratum basal |
network of collagen fibers present in the reticular layer of the dermis |
Which epidermal cells act as sensory touch receptors? A) melanocytes |
tactile cells |
In people with lighter skin, respiratory failure can lead to a change in the color of the skin. Which pigmentation factor is affecting this change? A) carotene |
hemoglobin |
What is the role of the hair follicle? A) The hair follicle serves as an anchor for the hair shaft. |
The hair follicle serves as an anchor for the hair shaft. |
You discover a new type of gland associated with the skin. Chemical analysis of the product shows a secretion has a pH of 4, consists of 99% water, and contains traces of normal electrolytes including urea, vitamin C, and dermicidin. There are no traces of fats or proteins. How would you classify this new gland? A) ceruminous gland |
eccrine gland |
Which of the following represents a difference between eccrine sweat glands and apocrine sweat glands? A) The secretions of apocrine sweat glands contain more fat and protein than do the secretions of eccrine sweat glands. |
The secretions of apocrine sweat glands contain more fat and protein than do the secretions of eccrine sweat glands. |
In alopecia, new hair growth stops because cell division is inhibited in the_________. A) epithelial root sheath |
hair matrix |
In the presence of sunlight, Vitamin D precursors are produced. This is important for the transport of sodium in our intestines. Is this statement true or false? A) True |
False |
Which of the following does NOT protect the skin from bacteria? A) the low pH of the skin |
the temperature of the skin |
Our skin helps us to regulate our body temperature by causing shivering. Is this statement true or false? A) True |
False |
Which of the following is NOT an immediate threat to the system as a result of burns? A) dehydration |
bacterial infection |
Which of the following would NOT be a correct characteristic of melanoma? A) diameter of 12 mm |
border regularity |
Which stratum of the epidermis contains the stem cells responsible for regenerating the more superficial layers? A) stratum spinosum |
stratum basale |
Which type of cell is NOT found in the epidermis? A) dendritic cells |
pain receptors |
Which dermal layer is responsible for the dermal properties of skin that are evident as cleavage lines? A) the granular layer |
the reticular layer |
In general, skin cancer is least likely to develop in which of the following locations? A) scalp |
scalp |
New portions of a nail are produced at the nail bed. Is this statement true or false? A) True |
False |
Earwax is made by __________. A) sebaceous glands |
ceruminous glands |
The most dangerous type of skin cancer is _______. A) melanoma |
melanoma |
The biggest risk factor for the development of skin cancer is excessive exposure to ultraviolet radiation from sunlight. Exposure to UV light in a tanning booth is safer. Is this statement true or false? A) True |
False |
Pigment can be found in several layers of the epidermis. In which layers would you expect to find the cells that produce melanin? A) stratum spinosum |
stratum basale |
Which skin-color-associated, pigment-producing cell is located in the labeled layer D? A) fibroblast |
melanocyte |
If a person were born without eccrine glands, what skin function would he or she have a hard time completing? A) metabolic function |
thermoregulation |
Which skin pigment is made in the skin as a natural defense against UV radiation? A) carotene |
melanin |
Which of the following is NOT a function of sebum? A) protection from bacteria |
protection from UV radiation |
Which glands secrete an oily product that softens the skin and hair? A) ceruminous glands |
sebaceous glands |
In a woman that has hirsutism, ________. A) the keratin filaments in hair undergo cell division to thicken the hair |
androgens stimulate vellus hair to become terminal hair |
Which of the following best explains the fact that eyebrows do NOT grow as long as the hair on the head? A) The hair follicles of the eyebrows do not have a hair matrix; the hair follicles in the scalp do have a hair matrix. |
The hair follicles of the eyebrows are active for only a few months before becoming inactive; the hair follicles in the scalp are active for years before becoming inactive. |
Susan sat out in the sun watching a baseball game. She developed small blisters on her unprotected shoulders and neck. What type of burn is represented by the formation of the blisters? A) first-degree burn |
second-degree burn |
Chapter 5 Homework
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