Basic Integumental System

Question 1

Layers of skin

Answer 1

Epidermis 
 - Stratum corneum
 - Stratum basalis
Dermis
 - Papillar darmis
 - Reticular layer

Question 2

Cell types of epidermis

Answer 2

Stratified squamous epithelial cells

Question 3

Layers of epidermis

Answer 3

Stratum corneum

Stratum basalis

Question 4

Stratum corneum
1)
2)

Answer 4

1) Outer layer of the epidermis

2) Dead, keratinised cells

Question 5

Stratum  basalis
1)
2)
3)
4)

Answer 5

1) Inner layer of the epidermis
2) Single cell thick
3) Contains melanocytes
4) Avascular, aneural

Question 6

Layers of dermis

Answer 6

Papillar dermis

Reticular layer

Question 7

Papillar dermis

Answer 7

Adheres to epidermis (stratum basalis)

Collagen, elastin fibers

Question 8

reticular layer

Answer 8

Thicker collagen, elastin fibers than papillar dermis

Adheres to subcutaneous tissue

Question 9

Features of dermis on flexor surfaces

Answer 9

More sensitive

Question 10

Where is the dermis more sensitive?

Answer 10

On flexor surfaces

Question 11

Where is the dermis thicker and tougher?

Answer 11

Extensor surfaces

Question 12

Dermis

Answer 12

Lies deep to the epidermis

Highly vascular, innervated

Question 13

Subcutaneous tissue

Answer 13

Subcutaneous fat

Fascia

Question 14

What are skin creases?

Answer 14

Skin is bound down over a joint to prevent interference with movement

Question 15

Features of thick skin
1)
2)
3)
4)
5)
6)

Answer 15

1) Greatly thickened epidermis
2) Reduced dermal thickness
3) Strongly bound to underlying layer of connective tissue
4) Many sudoriferous glands
5) No hair, pigment
6) Palmar, planter skin

Question 16

Pilosebacious unit function
1)
2)

Answer 16

1) Secrete oil, waterproof skin

2) Hair growth

Question 17

Pilosebacious unit features
1)
2)
3)

Answer 17

1) Hair follicle
2) Sebacious gland
3) Erector pili muscle

Question 18

Sudoriferous glands

Answer 18

Sweat glands locked in the dermis

Question 19

Where are sudoriferous glands absent?

Answer 19

1) Nail beds
2) Nipples
3) Ear drum
4) Lips

Question 20

Odoriferous glands

Answer 20

Modified sudoriferous glands

Located in armpits, genitals, around anus

Question 21

How do dermatomes migrate?

Answer 21

Migrate along preaxial border

Return along postaxial border

Question 22

Where is there overlap between dermatomes?

Answer 22

Between adjacent dermatomes

Question 23

Where is there never overlap between dermatomes?

Answer 23

Across axial border (midline)

Question 24

How do the overlaps of nociception, thermoception and touch dermatomes differ?

Answer 24

Overlap for touch is smaller than for nociception and thermoception

Question 25

If an entire dermatome is absent, what sensation is there?

Answer 25

Still nociceptive and thermoceptive sensation, from overlapping dermatomes

Question 26

Where can herpesviridae reemerge as shingles?

Answer 26

In the same dermatome as they initially infected

Question 27

What is an angiosome?

Answer 27

Area supplied by a single artery and returning vein

Question 28

What is a lymphotome?

Answer 28

Area of skin drained by a particular lymph node

Question 29

What is a lymph watershed area?

Answer 29

Where lymph can drain to one of two sets of lymph nodes

Question 30

Lymph watershed areas 1) 2)

Answer 30

1) Cervical/axillary watershed | 2) Inguinal/axillary watershed