Integumentary System

Question 1

In latin, Integumentum means…

Answer 1

Covering

Question 2

Is Epidermis Vascular or Avascular?

Answer 2

Avascular

Question 3

On the Epidermis, there are keratinocytes undergoing..

Answer 3

kertinisation

Question 4

There are 5 layers of in the epidermis

Answer 4

BGSLC
1. Stratum Basale (Deep)
2. Stratum Spinosum
3. Stratum Granulosum
4. Stratum Lucidum *
5. Stratum Corneum (Superficial)

*Thick skin only

Question 5

Journey from stratum basale to stratum corneum is…. days

Answer 5

25 - 45 days

Question 6

Stratum basale has mitotically (active/inactive) (type) cells.

Answer 6

Active. Cuboidal

Question 7

Stratum basale cells are attached to the base by …….. and attached to each other by ……

Answer 7

Hemidesmosomes
Desmosomes

Question 8

stratum spinosum has …… cells that (has/ does not have) central nuclei

Answer 8

polyhedral “pointy”

Has central nuclei

Question 9

Stratum Granulosum has ……… cell layers thick

Answer 9

3 - 5 cell layers thick

Question 10

Stratum Lucidum is only present if the skin is…

Answer 10

thick

Question 11

Does stratum lucidum have nuclei and organelles?

Answer 11

No

Question 12

Stratum lucidum has translucent layer of flattened ……………

Answer 12

eosinophilic keratinocytes

Question 13

Stratum corneum is …………layers of ………..cells

Answer 13

15 - 20 layers of squamous keratinised cells

Question 14

Precentage of Cellls of Epidermis…

Keratinocytes
Epithelial Tactile Cell
Melanocytes
Antigen presenting cell

Answer 14

Keratinocytes (85%)
Epithelial Tactile Cell (7.5%)
Melanocytes (5%)
Antigen presenting cell (2.5%)

Question 15

Cells of Epidermis: (4)

Answer 15

Keratinocytes
Epithelial Tactile Cell
Melanocytes
Antigen presenting cell

Question 16

Epithelial Tactile Cell’s Eponym

Answer 16

Merkel cells

Question 17

Epithelial tactile cells is located in which stratum?

Answer 17

Stratum basale

Question 18

Tonic receptors are for (light/heavy) touch

Answer 18

light touch

Question 19

Type I merkel cell slowly adapts to ………..receptor

Answer 19

mechanoreceptor

Question 20

Melanosomes accumulate as a supra-nuclear cap that
protects the nuclear DNA of keratinocytes from …

Answer 20

UV radiation

Question 21

Antigen presenting cell’s eponym:

Answer 21

Langerhands cells

Question 22

melanocytes are derived from ….. (embryonic structure)

Answer 22

Neural crest

Question 23

Langerhans cells (antigen presenting cells) is derived from

Answer 23

monocytes

Question 24

melanocytes produce ….. (brown/black pigments)

Answer 24

eumalins

Question 25

Langerhan cells is located in which stratum?

Answer 25

Stratum Spinosum

Question 26

Langerhan cells is located in which stratum?

Answer 26

Stratum Spinosum

Question 27

Dermis has 2 layers:

Answer 27

Papillary and Reticular Layer

Question 28

Reticular Vs papillary layer

Answer 28

Papillary: Thin. Superficial

Reticular: Thick. Deep

Question 29

Collagen types in Dermis layers

Answer 29

Papillary: Type I and II collagen

Reticular: Type I irregular Collagen

Question 30

Tactile Corpuscle Eponym:

Answer 30

Meissner Corpuscle

Question 31

Lamellar courpuscles eponym:

Answer 31

Pacinian corpuscle

Question 32

Lamellar corpuscle located in:

Answer 32

Reticular dermis

Question 33

Hypodermis has a layer of ……… and …tissue

Answer 33

a layer of adipose tissue and loose connective tissue

Question 34

Nails is plates of … forming hard keratin

Answer 34

Corneocytes

Question 35

Skin glands: (3)

Answer 35

Sebaceous Glands
Apocrine sweat glands
Eccrine sweat glands

Question 36

Apocrine vs eccrine sweat glands secretion:

Answer 36

Apocrine: Secrete protein rich sweat. (related to hair follicle)

Eccrine: Secrete salty urea sweat (not related to hair follicle)