Integumentary system

Question 1

Epidermis
● Lining →

Answer 1

Stratified Squamous Keratinized Epithelium

Question 2

produces “pigments”

Answer 2

MELANOCYTES

Question 3

considered as antigen-presenting
cells, has immune functions against microorganisms
penetrating the skin

Answer 3

LANGERHANS CELL

Question 4

tactile epithelial cells, these are
sensitive mechanoreceptors for light touch sensation

Answer 4

MERKEL CELLS

Question 5

Most superficial layer; 20-30 layers of dead, flattened, anucleate, keratin-filled keratinocytes; protects againts friction and water loss

Answer 5

stratum corneum

Question 6

2-3 layers of anucleate, dead cells; seen only in thick skin

Answer 6

stratum lucidum

Question 7

3-5 layers of keratinocytes with distinct kerato-hyali e granules

Answer 7

stratum granulosum

Question 8

several layers of keratinocytes all joined by desmosomes; langerhans cell present

Answer 8

stratum spinosum

Question 9

deepest, single layer of cuboidal to low culumnar cells in contact with basement membrane; mitosis occurs here; melanocytes and merkel cells also

Answer 9

stratum basale

Question 10

layer of epidermis (5)

Answer 10

stratum corneum
stratum lucidum
stratum granulosum
stratum spinosum
stratum basale

Question 11

Primary function is to support the epidermis

Answer 11

Dermis

Question 12

thickness will depend on the region or part of the body

Answer 12

Dermis

Question 13

The surface of the dermis is very __ and has many
dermal __ projections, and this is subject to frequent pressure.

Answer 13

irregular
papillae

Question 14

always occurs between the Stratum Basale and the dermis, and follows the contour of the interdigitations between these layers

Answer 14

BASEMENT MEMBRANE

Question 15

Dermis

Nutrients diffuse through the

Answer 15

BASEMENT MEMBRANE

Question 16

More superficial layer of dermis; composed of areolar connective tissue; forms dermal papillae; contains subpapillary vascular plexus

Answer 16

Papillary layer

Question 17

Deeper layer of dermis; dense irregular connective tissue surrounding hair follicles, subaceous glands and sweat glands, nerves, and deep plexus of blood vessels extending into subcutaneous layers

Answer 17

Reticular layer

Question 18

Consist of the dermal papillae

Answer 18

Thin Papillary Layer

Question 19

Consist of loose connective
tissue with Type I and III
Collagen Fibers, Fibroblasts,
Mast cells, Dendritic cells, &
Leukocytes

Answer 19

Thin Papillary Layer

Question 20

Consists of Type VII Collagen
Fibers
(Anchoring
Fibrils)
which binds the dermis to the
epidermis.

Answer 20

Thin Papillary Layer

Question 21

Layers of the Dermis

Thicker

Answer 21

Reticular Layer

Question 22

Consist of dense irregular
connective tissue (bundles
of Type I Collagen), with
more fibers & fewer cells
than papillary layer

Answer 22

Reticular Layer

Question 23

Elastic
Fibers
present,
providing elasticity

Answer 23

Reticular Layer

Question 24

Consists of
proteoglycan
rich in dermatan sulfate

Answer 24

Reticular Layer

Question 25

The subcutaneous tissue is also known as the (2)

Answer 25

“Superficial Fascia” or the “Hypodermis”

Question 26

It is a type of loose connective tissue, with the presence of Adipocytes

Answer 26

Subcutaneous Layer

Question 27

Well-vasculated layer

Answer 27

Subcutaneous Layer

Question 28

Pharmacologic function → medications or drugs injected into the subcutaneous tissue exhibits

Answer 28

rapid uptake

Question 29

Hairs form in hair follicles

Answer 29

keratinocytes

Question 30

comprising the matrix of the deep hair bulb proliferate rapidly and undergo keratinization to form the

Answer 30

medulla, cortex, and cuticle of a hair root.

Question 31

penetrates the base of the hair bulb, and its vasculature supplies nutrients and oxygen for proliferating and differentiating cells.

Answer 31

large dermal hair papilla

Question 32

Nails are formed in a manner similar to hairs

Answer 32

keratinocytes

Question 33

proliferate in the matrix of the __ __ and differentiate with the formation of hard keratin as a __ __ __ with edges covered by skin folds

Answer 33

nail root growing nail plate

Question 34

Glands of the Skin produce sebum by terminal differentiation of sebocytes, the classic example of __ __, secreting this oily substance onto hair in the follicles or pilosebaceous units

Answer 34

Sebaceous glands holocrine secretion

Question 35

Glands of the Skin in the dermis produce sweat that is mostly water onto the skin surface, where its evaporation provides an important mechanism for cooling the body

Answer 35

Eccrine sweat glands

Question 36

Glands of the Skin restricted to skin of the __ and __, have much wider lumens than eccrine glands, develop __ __, and secrete protein-rich sweat onto the hair of hair follicles.

Answer 36

Apocrine sweat glands axillae and perineum after puberty