Question 1

The dermis has two major layers. Which layer constitutes 80% of the dermis and is responsible for the tension lines in the skin?

Accepted Answer

A)   the reticular layer
B)   the hypodermal layer
C)   the subcutaneous layer
D)   the papillary layerE) A) and B)
F) B) and C)

Question 2

Melanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes ________.

Accepted Answer

A)   provide the melanocyte with nutrients necessary for melanin synthesis
B)   accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer
C)   maintain the appropriate temperature so the product of the melanocyte will not denature
D)   maintain the appropriate pH in order for the melanocyte to synthesize melanin granulesE) C) and D)
F) B) and D)

Question 3

We are told that every surface we touch is teeming with bacteria, and bacteria are found in the pools we swim in, the water we wash with, and on the hands of friends. Why are we not inundated with bacterial infections on our skin?

Accepted Answer

The low pH of the skin secretions, other...

Question 4

Which statement correctly expl ains why hair appears the way it does?

Accepted Answer

A)   Perfectly round hair shafts result in wavy hair.
B)   Gray hair is the result of hormonal action altering the chemical composition of melanin.
C)   Air bubbles in the hair shaft cause straight hair.
D)   Kinky hair has flat, ribbonlike hair shafts.E) B) and D)
F) A) and B)

Question 5

A needle would pierce the epidermal layers of the forearm in which order?

Accepted Answer

A)   basale, spinosum, granulosum, lucidum, corneum
B)   granulosum, basale, spinosum, corneum
C)   basale, spinosum, granulosum, corneum
D)   corneum, granulosum, spinosum, basaleE) A) and B)
F) A) and C)

Question 6

A light skinned person may appear pink when they become over heated. The best explanation for this is ________.

Accepted Answer

A)   blood flow has increased to the sweat glands in order to increased their metabolic activity
B)   the melanocytes are responding to the heat of the sun and change the appearance of the skin with increased production
C)   the heart is pumping faster because the person was probably exercising
D)   the blood vessels of the dermis have undergone vasodilation, bringing a greater volume of blood to the skinE) None of the above
F) B) and D)

Question 7

The major regions of a hair shaft include all of the following except ________.

Accepted Answer

A)   medulla
B)   cuticle
C)   external root sheath
D)   cortexE) B) and C)
F) All of the above

Question 8

A surgeon opens her patient by cutting the integument parallel to the cleavage lines of the dermis (tension lines) . This will result in ________.

Accepted Answer

A)   greater chance of infection
B)   faster healing of the skin and less scaring
C)   slowed healing and grater scaring
D)   less chance for infectionE) C) and D)
F) B) and D)

Question 9

Why are the apocrine sweat glands fairly unimportant in thermal regulation?

Accepted Answer

They are largely confined to t...

Question 10

Select the most correct statement concerning skin cancer.

Accepted Answer

A)   Basal cell carcinomas are the least common but most malignant.
B)   Most tumors that arise on the skin are malignant.
C)   Squamous cell carcinomas arise from the stratum corneum.
D)   Melanomas are rare but must be removed quickly to prevent them from metastasizing.E) All of the above
F) B) and D)

Question 11

Which glands produce ear wax?

Accepted Answer

A)   eccrine glands
B)   apocrine glands
C)   ceruminous glands
D)   merocrine glandsE) C) and D)
F) None of the above

Question 12

Despite its apparent durability, the dermis is subject to tearing. How might a person know that the dermis has been previously stretched and/or torn?

Accepted Answer

A)   The stretching causes the tension lines to disappear.
B)   The appearance of visible, silvery-white scars is an indication of stretching of the dermis.
C)   There is an episode of acute pain due to the large number of tactile corpuscles.
D)   The blood vessels in the dermis rupture and the blood passes through the tissue, causing permanent "black-a nd-blue marks."E) A) and B)
F) B) and D)

Question 13

Changes in the color of skin are often an indication of a homeostatic imbalance. Which of the following changes would suggest that a patient is suffering from Addison's disease?

Accepted Answer

A)   The skin takes on a bronze or metallic appearance.
B)   The skin appears to have an abnormal, yellowish tint.
C)   Black-a nd-blue marks become evident for no apparent cause.
D)   It is impossible to suggest Addison's disease from an inspection of a person's skin.E) None of the above
F) A) and D)

Question 14

The skin protects, but how does it protect us and from what? Describe how the epidermal dendritic cells and melanocytes protect us. Describe what these cells protect us from.

Accepted Answer

The epidermal dendritic cells act as ant...

Question 15

In addition to the synthesis of vitamin D, keratinocytes are able to carry out some other biologically important functions. Name at least two of these other functions.

Accepted Answer

Keratinocyte enzymes can neutr...

Question 16

Melanoma is a form of skin cancer that arises from melanocytes. Melanoma is most common in Caucasians between 40 and 70 years of age. Explain why Caucasians would have a greater incidence of melanoma.

Accepted Answer

Melanoma has its beginnings in melanocyt...

Question 17

What complications might be anticipated from the loss of large areas of skin surfaces?

Accepted Answer

Large losses of skin, as with ...

Question 18

The only place you will find stratumthe ________ is in the skin that covers the palms, fingertips, and soles offeet.

Accepted Answer

lucidum ________ is ...

Question 19

Cells of the stratum spinosum have many interlocking desmosomes that will remain between the cells as they migrate to the stratum corneum. These cell junctions serve the body by________.

Accepted Answer

A)   stopping water loss and preventing dehydration
B)   allowing secretions like sweat or sebum to pass through
C)   preventing ultraviolet light from penetrating the deeper layers of the epidermis
D)   preventing mechanical stress or trauma from damaging the epidermisE) B) and D)
F) A) and B)

Question 20

The reason the hypodermis acts as a shock absorber is that ________.

Accepted Answer

A)   the major part of its makeup is adipose, which serves as an effective shock absorber
B)   the cells that make up the hypodermis secrete a protective mucus
C)   it is located just below the epidermis and protects the dermis from shock
D)   it has no delicate nerve endings and can therefore absorb more shockE) None of the above
F) B) and C)

Exam 5: The Integumentary System

The reason the hypodermis acts as a shock absorber is that ________.

Correct AnswerverifiedShow Answer

Despite its apparent durability, the dermis is subject to tearing. How might a person know that the dermis has been previously stretched and/or torn?

Correct AnswerverifiedShow Answer

Melanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes ________.

Correct AnswerverifiedShow Answer

The only place you will find stratumthe ________ is in the skin that covers the palms, fingertips, and soles offeet.

Correct Answerverifiedlucidum ________ is ...View AnswerShow Answer

We are told that every surface we touch is teeming with bacteria, and bacteria are found in the pools we swim in, the water we wash with, and on the hands of friends. Why are we not inundated with bacterial infections on our skin?

Correct AnswerverifiedThe low pH of the skin secretions, other...View AnswerShow Answer

The major regions of a hair shaft include all of the following except ________.

Correct AnswerverifiedShow Answer

A surgeon opens her patient by cutting the integument parallel to the cleavage lines of the dermis (tension lines) . This will result in ________.

Correct AnswerverifiedShow Answer

A needle would pierce the epidermal layers of the forearm in which order?

Correct AnswerverifiedShow Answer

Which statement correctly expl ains why hair appears the way it does?

Correct AnswerverifiedShow Answer

Melanoma is a form of skin cancer that arises from melanocytes. Melanoma is most common in Caucasians between 40 and 70 years of age. Explain why Caucasians would have a greater incidence of melanoma.

Correct AnswerverifiedMelanoma has its beginnings in melanocyt...View AnswerShow Answer

The dermis has two major layers. Which layer constitutes 80% of the dermis and is responsible for the tension lines in the skin?

Correct AnswerverifiedShow Answer

A light skinned person may appear pink when they become over heated. The best explanation for this is ________.

Correct AnswerverifiedShow Answer

Cells of the stratum spinosum have many interlocking desmosomes that will remain between the cells as they migrate to the stratum corneum. These cell junctions serve the body by________.

Correct AnswerverifiedShow Answer

Select the most correct statement concerning skin cancer.

Correct AnswerverifiedShow Answer

What complications might be anticipated from the loss of large areas of skin surfaces?

Correct AnswerverifiedLarge losses of skin, as with ...View AnswerShow Answer

In addition to the synthesis of vitamin D, keratinocytes are able to carry out some other biologically important functions. Name at least two of these other functions.

Correct AnswerverifiedKeratinocyte enzymes can neutr...View AnswerShow Answer

The skin protects, but how does it protect us and from what? Describe how the epidermal dendritic cells and melanocytes protect us. Describe what these cells protect us from.

Correct AnswerverifiedThe epidermal dendritic cells act as ant...View AnswerShow Answer

Changes in the color of skin are often an indication of a homeostatic imbalance. Which of the following changes would suggest that a patient is suffering from Addison's disease?

Correct AnswerverifiedShow Answer

Why are the apocrine sweat glands fairly unimportant in thermal regulation?

Correct AnswerverifiedThey are largely confined to t...View AnswerShow Answer

Which glands produce ear wax?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
lucidum ________ is ...
View Answer

Correct Answer
verified
The low pH of the skin secretions, other...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Melanoma has its beginnings in melanocyt...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Large losses of skin, as with ...
View Answer

Correct Answer
verified
Keratinocyte enzymes can neutr...
View Answer

Correct Answer
verified
The epidermal dendritic cells act as ant...
View Answer

Correct Answer
verified

Correct Answer
verified
They are largely confined to t...
View Answer

Correct Answer
verified