Week 4 - Integumentary System Flashcards

1
Q

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

a) Keratin
b) Melanin
c) Melatonin
d) Carotene
e) Collage

A

b) Melanin

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2
Q

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

a) Stratum basale
b) Stratum spinosum
c) Stratum granulosum
d) Stratum lucidum
e) Stratum corneum

A

c) Stratum granulosum

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3
Q

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

a) Hypodermis
b) Basement membrane
c) Epidermis
d) Dermis
e) Subcutaneous (subQ) layer

A

d) Dermis

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4
Q

Characteristics of thick skin include:

a) Found in the palms, soles of the feet and fingertips.
b) Does not contain hair follicles.
c) Contains more sweat glands than thin skin.
d) Contain epidermal ridges.
e) All of these choices are correct

A

e) All of these choices are correct

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5
Q

Which of the following structures found in the skin plays an important role in thermoregulation?

a) Merkel cells
b) Sebaceous glands
c) Sweat glands
d) Nails
e) Fingerprints

A

c) Sweat glands

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6
Q

Which of the following structures found in the skin help prevent water loss and inhibit bacterial growth on the surface of the skin?

a) Arrector pili
b) Lunula
c) Sweat glands
d) Hair follicles
e) Oil glands

A

e) Oil glands

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7
Q

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

a) Alopecia
b) Vellus
c) Lanugo
d) Papilla
e) Lunula

A

c) Lanugo

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8
Q

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

a) Sebaceous gland
b) Sudoriferous gland
c) Both sebaceous gland and sudoriferous gland
d) None of these answers are correct

A

a) Sebaceous gland

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9
Q

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

a) Sweat
b) Lanugo
c) Vellus
d) Sebum
e) Mucus

A

d) Sebum

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10
Q

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

a) Sebaceous gland
b) Eccrine sweat gland
c) Apocrine sweat gland
d) Ceruminous gland
e) None of these answer choices are correct.

A

b) Eccrine sweat gland

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11
Q

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

a) Hypertrophic scar
b) Keloid scar
c) Proliferative scar
d) Inhibitory scar
e) Granuloma

A

b) Keloid scar

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12
Q

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

a) papule
b) laceration
c) keratosis
d) frostbite
e) eczema

A

e) eczema

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13
Q

Which of the following terms refers to a Hardened and thickened area of skin resulting from persistent pressure and friction?

a) callus
b) blister
c) wart
d) papule
e) fever blister

A

a) callus

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14
Q

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?

a) wart
b) hives
c) papule
d) cyst
e) eczema

A

b) hives

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15
Q

“Goose bumps” are caused by

a) contraction of arrector pili muscles.
b) secretions from the sudoriferous glands.
c) contraction of dermal papillae.
d) stimulation of hair root plexus.
e) secretions from the sebaceous gland.

A

a) contraction of arrector pili muscles.

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16
Q

The hair root plexus functions to

a) support the growing hair.
b) cause the hair shaft to become erect.
c) stimulate sweat secretion.
d) give rise to the hair matrix.
e) assist hair in touch perception.

A

e) assist hair in touch perception.

17
Q

Which of the following chemicals does NOT contribute to the color of human skin?

a) carotene
b) hemoglobin
c) pheomelanin
d) eumelanin
e) melatonin

A

e) melatonin

18
Q

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?

a) UV radiation stimulates increased numbers of melanocytes in the skin.
b) UV radiation stimulates increased numbers of keratinocytes in the skin.
c) UV radiation stimulates increased production of melanin by melanosomes.
d) UV radiation inactivates tyrosinase activity in melanocytes.
e) UV radiation stimulates increased production of carotenes by keratinocytes.

A

c) UV radiation stimulates increased production of melanin by melanosomes.

19
Q

Which of the following is a common characteristic of thin skin?

a) Hairless.
b) Contains a stratum lucidum.
c) High density of sensory receptors.
d) Presence of sebaceous glands.
e) Contains epidermal ridges.

A

d) Presence of sebaceous glands.