Week 4 - Integumentary System

Question 1

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

Answer 1

b) Melanin

Question 2

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

Answer 2

c) Stratum granulosum

Question 3

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

Answer 3

d) Dermis

Question 4

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

Answer 4

e) All of these choices are correct

Question 5

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

Answer 5

c) Sweat glands

Question 6

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

Answer 6

e) Oil glands

Question 7

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

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

Answer 7

c) Lanugo

Question 8

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

Answer 8

a) Sebaceous gland

Question 9

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

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

Answer 9

d) Sebum

Question 10

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.

Answer 10

b) Eccrine sweat gland

Question 11

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

Answer 11

b) Keloid scar

Question 12

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

Answer 12

e) eczema

Question 13

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

Answer 13

a) callus

Question 14

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

Answer 14

b) hives

Question 15

“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.

Answer 15

a) contraction of arrector pili muscles.

Question 16

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.

Answer 16

e) assist hair in touch perception.

Question 17

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

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

Answer 17

e) melatonin

Question 18

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.

Answer 18

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

Question 19

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.

Answer 19

d) Presence of sebaceous glands.