Integumentary System

Question 1

stratum corneum

Answer 1

• contains mostly dead cells

- accounts for the majority of epidermal thickness in thick skin

Question 2

stratum lucidum

Answer 2

-layer of translucent cells; absent in the skin

Question 3

stratum granulosum

Answer 3

cells containing kearatohyaline and lamellated granules

Question 4

stratum spinosum

Answer 4

• in microscope slides it has a “prickly” appearance

Question 5

stratum basale

Answer 5

• cells actively divide to give rise to all the layers superficial to it
• layers where most melanocytes are found

Question 6

Papillary layer

Answer 6

• more superficial in the dermis

- composed mostly of areolar c.t.

Question 7

Reticular layer

Answer 7

• gives skin most of its strength

- thicker

Question 8

Hypodermis

Answer 8

• allows skin to slide somewhat over deeper structures like muscles and bones.
• mostly adipose with some areolar c.t.
• aka superficial fascia

Question 9

Epidermis

Answer 9

• stratified squamous epithelium

- has keratinocytes and melanocytes

Question 10

Dermis

Answer 10

• 80% of dense irregular connective tissue
• location of blood vessels that supply stratum basale.
• location of sweat glands

Question 11

What does not contribute to the skin color?

Answer 11

keratin

Question 12

A bluish cast to the skin resulting from inadequate oxygenation of the blood is called

Answer 12

cyanosis

Question 13

which of the following protects against damage by UV light?

Answer 13

Melanin

Question 14

Differences in skin color between individuals of different ethic groups are primarily due to:

Answer 14

the type of melanin they make

Question 15

UV rays stimulate the production of

Answer 15

• vitamin D/ melanin

Question 16

High levels of sunshine cause blood folate levels in light skinned people to

Answer 16

• increase

Question 17

Low folate levels during pregnancy increase the risk that the baby will have:

Answer 17

neural tube defects

Question 18

For people living in intermediate latitudes, the skin color that provides the best balance between folate levels and vitamin D production, as well as protection against damage by UV light is

Answer 18

medium brown skin

Question 19

In humans when is the main function of body hair?

Answer 19

sense things lightly touching the skin

Question 20

Hair is made of dead cells containing:

Answer 20

hard keratin

Question 21

The outer protective covering of a hair is the

Answer 21

cuticle

Question 22

Tubular invaginations of the epidermis form which the hair grows are called

Answer 22

hair follicles

Question 23

THe bundle of capillaries in the base of the hair bulb is the

Answer 23

papilla

Question 24

The bundle of smooth muscle attached to the hair root that can cause the hair to stand on end is

Answer 24

arrector pili muscle

Question 25

The short, fine hair distributed over most of the

Answer 25

vellus hair

Question 26

The long, courser hair found mostly on the scalp is called

Answer 26

terminal hair

Question 27

Which glands make an oily secretion that keeps hair supple and waterproofs the skin?

Answer 27

sebaceous glands

Question 28

which type of gland secretes sweat?

Answer 28

sudoriferous

Question 29

which sweat glands are scattered all over the surface of the body?

Answer 29

eccrine

Question 30

Which sweat glands are found in the axillary and pubic areas?

Answer 30

apocrine

Question 31

which glands are associated with hair follicles?

Answer 31

apocrine

Question 32

Which glands begin functioning at puberty

Answer 32

apocrine

Question 33

which glands make earwax?

Answer 33

ceruminous

Question 34

Which of the following is part of the integumentary system?

Answer 34

hair, skin and nails

Question 35

Which type of epidermal cells fight infections by engulfing bacteria?

Answer 35

dendritic cells

Question 36

What is the function of keratin?

Answer 36

to make the stratum corneum tough and protective

Question 37

Which of the following is NOT located in the dermis?

Answer 37

Merkel cells

Question 38

Which of the following is nOT correct about the dermis?

Answer 38

It has an abundance of adipose tissue

Question 39

Which of the following is a function of the hypodermis?

Answer 39

to cushion and insulate the body

Question 40

The various appendages of the skin are derived from:

Answer 40

the stratum basle of the epidermis

Question 41

Which statement about the structure of a hair is NOT correct?

Answer 41

The hair follicles are usually associated with eccrine sudoriferous glands.

Question 42

The actively growing part of a nail, located proximal to the root is the

Answer 42

nail matrix

Question 43

Both the hair and the nails are formed of

Answer 43

dead, keratinized cells

Question 44

a burn that affects the epidermis and upper dermis, and exhibits blisters is a

Answer 44

second-degree burn

Question 45

a burn in which only the epidermis is damaged is a

Answer 45

first-degree burn

Question 46

Another name for a full- thickness burn is a

Answer 46

third-degree burn

Question 47

Which type of skin cancer appears as a dark patch that often arises from existing moles?

Answer 47

melanoma

Question 48

The most common type of skin cancer, which often appears as a dome-shaped, shiny nodule,

Answer 48

basal cell carcinoma

Question 49

which type of skin cancer appears as a scaly, irregular, reddened papule that tends to grow rapidly and metastasize if not removed?

Answer 49

squamous cell carcinoma

Question 50

What type is the most dangerous type of skin cancer?

Answer 50

melanoma

Question 51

Which of the following signs is NOT an indication of melanoma?

Answer 51

Small diameter of a mole