DAT Integumentary System Cheat Sheet

Question 1

Outermost layer of skin. 5 layers:

Answer 1

epidermis

Question 2

5 layers of epidermis from outside to inside

Answer 2

Stratum Corneum, Stratum Lucidum, stratum granulosum, Stratum Spinosum, Stratum Basale

Question 3

Outermost hydrophobic layer

Answer 3

Stratum Corneum

Question 4

Only present in palms of hands & soles of feet

Answer 4

Stratum Lucidum

Question 5

Skin cells lose organelles here, begin dying, and
are filled with keratin

Answer 5

stratum granulosum

Question 6

Provides skin strength/flexibility

Answer 6

stratum spinosum

Question 7

Held together by desmosomes

Answer 7

Stratum Spinosum

Question 8

Deepest layer of the epidermis where new skin
cells are formed

Answer 8

Stratum Basale

Question 9

Transfers skin pigment
melanin to keratinocytes

Answer 9

Melanocytes:

Question 10

Attach to sensory neurons and
functions in touch sensations

Answer 10

Merkel cells:

Question 11

Produce keratin

Answer 11

Keratinocytes:

Question 12

help waterproof skin

Answer 12

Keratinocytes:

Question 13

Interact with
immune cells

Answer 13

Langerhans cells:

Question 14

second layer of skin

Answer 14

dermis

Question 15

highly vascularized.

Answer 15

dermis

Question 16

what is dermis connected to epidermis by

Answer 16

via the basement membrane.

Question 17

2 layers of dermis

Answer 17

The Papillary Region, The Reticular Region

Question 18

Vascular network within upward
projecting papillae that helps supply
nutrients to epidermis & regulates
temperature

Answer 18

papillary region

Question 19

Papillae contain…

Answer 19

Meisner’s corpuscles
(sensory touch receptors)

Question 20

sensory touch receptors

Answer 20

meisners corpuscles

Question 21

Consists of areolar & adipose tissue

Answer 21

hypodermis

Question 22

Functions in fat storage, heat
insulation & shock absorption

Answer 22

hypodermis

Question 23

Contains pressure sensing nerve
ending & passage for blood vessels

Answer 23

hypodermis

Question 24

Region with dense connective tissue,
collagen & elastic fibers;

Answer 24

reticular region

Question 25

packed with glands, sweat gland ducts, fat, hair follicles

Answer 25

reticular region

Question 26

Aids in regulating body temperature

Answer 26

thermoregulation

Question 27

WHAT dilate to release heat & constrict to preserve heat

Answer 27

capillaries

Question 28

(piloerection reflex)

Answer 28

goosebumps

Question 29

occurs when cold, elevates hairs to trap heat

Answer 29

goosebumps

Question 30

Nerve endings in skin convey temp, pressure, pain, and touch

Answer 30

environmental sensory imput

Question 31

UV radiation activates skin molecules to synthesize ....

Answer 31

vitamin D

Question 32

skin is a vPhysical barrier to

Answer 32

abrasion, pathogens, & radiation

Question 33

2 kinds of sweat glands

Answer 33

eccrine gland, apocrine gland

Question 34

Opens directly to skin, located on majority of the skin.

Answer 34

eccrine gland

Question 35

Regulates temperature through perspiration and urea elimination

Answer 35

eccrine gland

Question 36

opens to hair follicles, more vicious secretion

Answer 36

apocrine gland

Question 37

where are Sebaceous (Oil) Glands connected to

Answer 37

Connected to hair follicles

Question 38

secrete oil that discourages microbial growth

Answer 38

sebaceous glands

Question 39

Found in ear canal & produce a wax–like material that acts as a barrier to entrance

Answer 39

Ceruminous (Wax) Glands

Question 40

Secretes milk

Answer 40

Mammary (Milk) Glands