Integumentary System

Question 1

What is the integumentary system composed of?

Answer 1

• Skin
• Hair
• Oil and sweat glands
• Nails
• Sensory receptors

Question 2

What is the largest organ in the body?

Answer 2

Skin

Question 3

What two parts is the skin composed of?

Answer 3

• The epidermis (superficial and thin)
• Dermis ( deeper and thicker)

Question 4

What two parts is the skin composed of?

Answer 4

• The epidermis (superficial and thin)
• Dermis ( deeper and thicker)

Question 5

What are the 6 main functions of the skin?

Answer 5

1. Regulate body temperature
2. Store blood
3. Protection
4. Detect sensations
5. Excrete and absorb substances
6. Synthesize vitamin D

Question 6

What are 90% of epidermal cells?

Answer 6

keratinocytes

Question 7

What is the function of keratinocytes?

Answer 7

• Secrete keratin (fibrous protein used for protection)
• Secrete lamellar granule (water-repellent sealant)

Question 8

What type of cells produce melanin (yellow-red or brown-black pigment associated with skin color and absorbs ultraviolet (UV) light))?

Answer 8

Melanocytes

Question 9

What is the name of an immune cell that recognizes antigen (foreign invaders)?

Answer 9

Intraepidermal macrophages

Question 10

What is the job of tactile epithelial cells?

Answer 10

Detect touch and interact with neurons (nerve cells)

Question 11

How many layers in thin skin?

Answer 11

4

Question 12

How many layers in thick skin?

Answer 12

5

Question 13

Name the layers of the skin

Answer 13

• Stratum corneum
• Stratum lucidum
• Stratum granulosum
• Stratum spinosum
• Stratum basale

Question 14

Which layer of the skin contain mostly dead keratinocytes to help protect the organism, calluses form here, and Keratinocytes mostly contain melanin?

Answer 14

Stratum corneum

Question 15

Which layer of the skin is only present in thick skin such as fingertips, palms and soles, and contains dead keratinocytes?

Answer 15

Stratum lucidum

Question 16

Which layer of the skin contains melanin and lamellar granules, and helps prevent fluid loss?

Answer 16

Stratum granulosum

Question 17

Which layer of the skin provides strength and flexibility?

Answer 17

Stratum spinosum

Question 18

Which layer of the skin contains stem cells? If damaged, a skin graft may be required.

Answer 18

Stratum basale

Question 19

What is the dermis mostly composed of?

Answer 19

connective tissue containing collagen and elastic fibers

Question 20

What does the superficial dermis contain?

Answer 20

Dermal papillae.
- Contain capillary loops
- Contain Corpuscles of touch (Meissner corpuscles)
- Free nerve endings that detect temperature, pain and itching

Question 21

What does deeper dermis contain?

Answer 21

A dense network of collagen and elastic fibers?
- Between these fibers there are adipocytes, hair follicles, nerve, oil glands and sweat glands

Question 22

Is the subcutaneous layer a part of the skin?

Answer 22

No

Question 23

What is another name for the subcutaneous layer?

Answer 23

hypodermis (below the dermis)

Question 24

What layer is composed of areolar tissue and adipose tissue?

Answer 24

Subcutaneous layer

Question 25

Fibers from the dermis extend into which layer and help anchor the skin?

Answer 25

subcutaneous layer

Question 26

What are the 3 main functions of the subcutaneous layer?

Answer 26

- Fat storage - Harbors blood vessels - May contain pressure sensors

Question 27

What is the primary cause of skin color differences?

Answer 27

Differences in skin color is primarily due to the amount of pigmentation keratinocytes produce

Question 28

What type of energy induces melanin?

Answer 28

UV light. Melanin helps protect the body against UV radiation.

Question 29

What is the cause of Albinism?

Answer 29

Keratinocytes are unable to produce melanin.

Question 30

What is the cause of Vitiligo?

Answer 30

Partial or complete loss of melanin production

Question 31

What do carrots contain that turn skin orange?

Answer 31

carotene

Question 32

Term describing bluish skin color after a person stops breathing

Answer 32

cyanotic

Question 33

What disease turns skin and eyes yellowish?

Answer 33

Jaundice - may be a sign of liver disease - also common amongst newborns

Question 34

Synonym for skin reddness

Answer 34

erythema

Question 35

Synonym for pale skin

Answer 35

Pallor skin. May occur during shock and anemia

Question 36

What are the 3 accesory structures of the skin?

Answer 36

1. Hair 2. Glands - Sebaceous glands (oil glands) - Sudoriferous glands (sweat glands) - Ceruminous glands (wax producing glands) 3. Nails

Question 36

Synonym for hair

Answer 36

pili

Question 37

What are hair thickness and distribution pattern regulated?

Answer 37

genetics and hormones

Question 38

Function of hair on head

Answer 38

protection from UV light

Question 39

The function of eyelashes and eyebrows

Answer 39

Protect the eyes from foreign matter

Question 40

The function of nostril hair

Answer 40

Prevent the body from inhaling foreign particles