Anatomy and Physiology Unit 5 Quiz (Integumentary)

This layer of epidermis is composed of a single row of cuboidal or columnar keratinocytes.

Stratum basale

Constant exposure of skin to friction stimulates the formation of a callus, which is the thickening of the ________ of the epidermis.

Stratum corneum

This layer of the epidermis contains layers of flattened keratinocytes that are going through apoptosis.

Stratum granulosum

Which of the following structures found in the skin plays an important role in thermoregulation? Merkel cells Sebaceous glands Sweat glands Nails Fingerprints

Sweat glands

Keratin...

Is a protein

The stratum lucidum...

Is only present in thick skin

Which condition is due to a buildup of bilirubin pigment in the skin?

Jaundice

In this type of scar, the scar tissue extends beyond the boundary of the injury into normal tissue.

Keloid scar

Which of the following terms refers to an irregular tear of the skin? Abrasion Papule Keloid Laceration Cyst

Laceration

This epidermal cell has a role in immunity and disease resistance.

Langerhans cells

This is fine nonpigmented hair that covers the body of the fetus.

Lanugo

This type of exocrine gland is a simple, branched acinar gland connected to a hair follicle.

Sebaceous gland

During embryonic development, which of the following accessory structures of the skin develops as an outgrowth of epithelial cells from the sides of a hair follicle? Eccrine sweat glands Apocrine sweat glands Sebaceous glands Fingernails Arrector pili muscles

Sebaceous glands

This is a mixture of triglycerides, cholesterol, proteins and inorganic salts.

Sebum

In the diagram of skin shown below, which labeled structure generates fingerprints?

A

In the figure of a sagittal section of a fingernail shown below, where is the nail root?

A

Which structure in the figure produces a protein that helps protect the skin and underlying tissues from heat, microbes and chemicals?

A

Which structures in the figure are sensitive to warmth, coolness and itching?

A

Which of the following skin disorders involves inflammation of sebaceous glands caused by bacteria which thrive in the lipid-rich sebum? Alopecia Acne Vitiligo Pressure ulcer Eczema

Acne

Characteristics of thick skin include: Found in the palms, soles of the feet and fingertips. Does not contain hair follicles. Contains more sweat glands than thin skin. Contain epidermal ridges. All of these choices are correct.

All of these choices are correct

The hair root plexus functions to...

Assist hair in touch perception

In the diagram of a hair root shown, where is the cortex?

B

In the diagram, which is the internal root sheath?

B

In the figure of a sagittal section of a fingernail shown, where is the eponychium (cuticle)?

B

In the photomicrograph of a portion of thick skin shown below, which layer is only seen in thick skin?

B

Which of the following best describes the events occurring at point A in the diagram of deep wound healing shown below?

Blood clot is forming

Which of the labeled cells in the diagram of deep wound healing shown below has phagocytic properties?

Both E & F

In the diagram of a hair root shown, where is the cuticle of the hair?

C

In the diagram of skin shown below, where is the sebaceous gland?

C

In the diagram, which is the external root sheath?

C

In the figure of a sagittal section of a fingernail shown, where is the lunula?

C

Which structure in the figure detects touch sensations?

C

Which of the following terms refers to a Hardened and thickened area of skin resulting from persistent pressure and friction? Callus Blister Wart Papule Fever blister

Callus

The process of keratinization involves...

Cells accumulating a tough fibrous protein that helps protect the skin

"Goose bumps" are caused by...

Contraction of arrector pili muscles

You stepped on a nail. List the sequential layers (or strata) of the epidermis that the nail penetrated through to finally reach the dermis.

Corneum, lucidum, granulosom, spinosum, basale

In the diagram of skin shown below, where is the arrector pili muscle?

D

In the photomicrograph of a portion of thick skin shown below, which layer is the stratum spinosum?

D

Meissner's corpuscle would be found in which layer of the skin shown in the figure?

D

Which structure in the figure produces a pigment that contributes to skin color and absorbs UV radiation?

D

This layer of the skin is composed mainly of dense irregular connective tissue containing collagen and elastic fibers.

Dermis

In the diagram, which is the papilla of the hair?

E

In the figure of a sagittal section of a fingernail shown below, where is the nail matrix?

E

In the photomicrograph of a portion of thick skin shown below, which layer is the stratum basale?

E

Which letter is pointing to the subcutaneous layer of the skin in the figure?

E

This type of exocrine gland is a simple, coiled tubular gland that is found throughout almost the entirety of the skin.

Eccrine sweat gland

Which of the primary germ layers of the embryo does the epidermis of the skin develop from? Endoderm Ectoderm Mesoderm All of these choices are correct. Both endoderm and ectoderm.

Ectoderm

Which of the following terms refers to an inflammation of the skin characterized by patches of redness, blistering, and extreme itching? Papule Laceration Keratosis Frostbite Eczema

Eczema

This layer of the skin is composed of a keratinized stratified squamous epithelium.

Epidermis

Which of the following best describes the events occurring at point B in the diagram of deep wound healing shown below?

Epithelium is migrating across wound

Which of the following terms refers to persistent redness of the skin such as seen in patients with inflammation, infection or heat exposure? Hirsutism Pallor Jaundice Androgenic alopecia Erythema

Erythema

In the diagram of a hair root shown, where is the dermal root sheath?

F

In the diagram of skin shown below, where is the apocrine sweat gland?

F

In the diagram, which is a melanocyte?

F

Which structure in the figure is a receptor sensitive to pressure?

F

In the diagram, which is the hair matrix?

G

In the diagram, which layer is the stratum granulosum?

G

In the diagram, which structure is directly destroyed by electrolysis?

G

In the figure of a sagittal section of a fingernail shown, where is the hyponychium (nail bed)?

G

Which structure is an eccrine sweat gland?

G

In the diagram of skin shown below, where is the reticular region of the dermis?

H

Which of the following conditions is characterized by excessive body hair caused by tumors in adrenal glands, testes or ovaries? Hirsutism Pallor Jaundice Androgenic alopecia Erythema

Hirsutism

Which of the following terms refers to reddened, elevated, and itchy patches of skin commonly caused by emotional stress, physical trauma, or certain food allergies? Wart Hives Papule Cyst Eczema

Hives

This is another name for the subcutaneous layer.

Hypodermis

In the diagram, which layer is the stratum corneum?

I

Which structures are dermal papillae?

I

Which condition results from androgens inhibiting hair growth in genetically predisposed adults? Hirsutism Pallor Jaundice Male-pattern baldness Erythema

Male pattern baldness

Albinism is the inherited inability to produce...

Melanin

This pigment secreted by specialized cells in the skin is capable of absorbing ultraviolet light.

Melanin

Which of the following chemicals does NOT contribute to the color of human skin? Carotene Hemoglobin Pheomelanin Eumelanin Melatonin

Melatonin

Which of the following structures found in the skin help prevent water loss and inhibit bacterial growth on the surface of the skin? Arrector pili Lunula Sweat glands Hair follicles Oil glands

Oil glands

Which of the following terms refers to paleness of the skin such as seen in patients with shock or anemia? Hirsutism Pallor Jaundice Androgenic alopecia Erythema

Pallor

Which of the following is a common characteristic of thin skin? Hairless. Contains a stratum lucidum. High density of sensory receptors. Presence of sebaceous glands. Contains epidermal ridges.

Presence of sebaceous glands

Which of the following best describes events that lead to the tanning of skin that occurs after exposure of the skin to the sun's UV radiation? UV radiation stimulates increased numbers of melanocytes in the skin. UV radiation stimulates increased numbers of keratinocytes in the skin. UV radiation stimulates increased production of melanin by melanosomes. UV radiation inactivates tyrosinase activity in melanocytes. UV radiation stimulates increased production of carotenes by keratinocytes.

UV radiation stimulates increased production of melanin by melanosomes