Epidermis & Integumentary System

Question 1

Skin Histology?

Answer 1

Is the study of the structure and composition of skin tissue.

Question 2

Skin Physiology?

Answer 2

Is the study of the functions of skin tissues

Question 3

What are the components of the Integumentary System ?

Answer 3

Skin
Hair
Nails
Glands

Question 4

Why is the integumentary system important for the heath of our body?

Answer 4

the integumentary system protects us from the exterior environment.

Question 5

What are the appendages of the skin?

Answer 5

Epithelial derivatives

Question 6

Where is the skin the thickest and the thinnest?

Answer 6

Thickest: Palms, Soles, & Tzone
Thinnest: Eyelids

Question 7

What are the characteristics of a healthy skin?

Answer 7

Soft
Moist
Flexible
PH: 5.5-5.6
Even Pigmentation
Free of disease

Question 8

6 primary functions of the Integumentary system?

Answer 8

P - protection 
A - absorption 
S - secretion 
S - sensation 
E- excretion
R - regulation of temperature

Question 9

Examples on how our skin protects us

Answer 9

Melanin- UV radiation

Acid Mantle- chemical barrier on surface

Question 10

What is the functions of the Acid Mantle?

Answer 10

PH: 5.5-5.6.
Protects against pathogenic bacteria and transepidermal waterloss.
Made up of Sebum, Sweat, Water, and Keratohyalin.

Question 11

What 2 pigments are found in the body and what color do they produce?

Answer 11

Pheomelanin: red to yellow
Eumelanin: brown to black

Question 12

What is the acid mantle made up of?

Answer 12

Sebum, sweat, water, and keratohyalin.

Question 13

How does our skin regulate our body temperature?

Answer 13

Perspiration & Evaporation, Insulation

When we get cold our arrestor pilli muscle traps in heat ( sticks our hairs up and gives us goosebumps)

Question 14

Why is sebum important for the health of our skin

Answer 14

Keeps skin lubricated, soft and hydrated, also important part of the acid mantle.

Question 15

3 major layers of our skin?

Answer 15

Dermis
Epidermis
Subcutaneous (Hypodermis)

Question 16

What are the 5 layers of the epidermis?

Answer 16

Stratum Corneum, Stratum Lucidum, Stratum Granulosum, Stratum Spinosum, & Stratum Germinativum.

Question 17

Keratinization Process?

Answer 17

The 28 days upward migration of skin cells from the stratum germinativum to startup corneum.

Question 18

What happens during Melanogenesis?

Answer 18

Melanin is produced and transported from the melanocyte to the surrounding cells.

Question 19

What is Desquamation?

Answer 19

Natural Shedding Process of the skin

Question 20

Function of the basement membrane?

Answer 20

Transports nutrients from the vascular (contains blood) dermis to dermis to the avascular (no blood) epidermis.

Made up of proteins and sugars

Question 21

STRATUM CORNEUM

of cells thick, water %, special features

Answer 21

of cells thick: 15- 20
water % : 5-10%
special features: Desquamation, 60% protein.

Question 22

STRATUM LUCIDUM

of cells thick, water %, special features

Answer 22

# of cells thick: 3-5
water % : 10-20%
special features: thickest on palms and soles / gives us fingerprints

Question 23

STRATUM GRANULOSUM

of cells thick, water %, special features

Answer 23

of cells thick: 3-5
water % : 20- 60 %
special features: keratohyalin, membrane coating granules

Question 24

STRATUM SPINOSUM

of cells thick, water %, special features

Answer 24

of cells thick: 5-8
water % : 60- 70 %
special features: keratin production occurs, langehans immune cells, & desmosomes.

Question 25

STRATUM GERMINATIVUM | of cells thick, water %, special features

Answer 25

of cells thick: 1 water % : 70- 40 % special features: only miotic layer contains melanocytes & desmosomes.

Question 26

A melanocyte is embryologically derived from

Answer 26

Nerve Tissue

Question 27

This hard protein provides the skin, hair, and nails with their protective function.

Answer 27

Keratin

Question 28

This structure separates the epidermis and the dermis

Answer 28

Basement Membrane/ Dermoepidermal Junction

Question 29

The cell processes that holds cells together in the germinativum and spinosum layer

Answer 29

Desmosomes

Question 30

Substances that coats the inside of the cell making it much stronger

Answer 30

membrane coating granules

Question 31

Intercellular lipid glue that holds dead skin cells together

Answer 31

Keratohyalin

Question 32

The process of melanin being produced in the skin

Answer 32

Melanogenesis

Question 33

The enzyme that needs to be present for melanin production

Answer 33

Tyrosinase