Ch. 6 Skin and its Appendages

Question 0

How much body weight does the skin make up

Answer 0

About 7%

Question 1

Largest organ in the body

Answer 1

Skin

Question 2

How many square feet does the skin cover

Answer 2

About 15 to 20 sq. Feet

Question 3

What type or organ is skin

Answer 3

Complex organ

Integrated functioning

Question 4

How is the most important function of the skin

Answer 4

Maintains stable internal environment called homeostasis

Question 5

Major functions of the skin

Answer 5

Protection of the skin
Sensation
Water balance
Temperature regulation

Question 6

Outer thinner layer of the skin

Answer 6

Epidermis

Question 7

What composes the epidermis

Answer 7

5 layers called strata

Question 8

Innermost layer that separates the dermis from the epidermis

Answer 8

Basal stratum

Question 9

Outermost layer in the epidermis

Answer 9

Cornified statum

Question 10

Thicker inner layer of the skin

Answer 10

Dermis

Question 11

What does the dermis contain

Answer 11

Abundant fibers
Fibroblasts
Blood vessels

Question 12

Produce melanin

Answer 12

Melanocytes

Question 13

Protects DNA from UVL

Answer 13

Melanin

Question 14

Where are melanocytes found

Answer 14

Dermis layer

Question 15

What helps anchor the epidermis to the dermis

Answer 15

Papillae

Question 16

Beneath the dermis layer of skin

Answer 16

Hypodermis

Subcutaneous

Question 17

What are the jobs of the hypodermis

Answer 17

Anchors skin to underlying tissue
Insulation
Cushions

Question 18

Where adipose cells are found

Answer 18

Hypodermis

Question 19

How much of the body’s fat can be found in the hypodermis

Answer 19

About half of body’s fat

Question 20

Why is the hypodermis clinically important

Answer 20

Site for injections

Question 21

What is the responsibility of genes

Answer 21

Determine the presence and distribution of three pigments

Question 22

Blood pigment which transports oxygen and gives a pinkish color to the skin

Answer 22

Hemoglobin

Question 23

Yellowish orange pigment found in the epidermis and hypodermis

Answer 23

Carotene

Question 24

Brownish black pigment which when unevenly distributed, produces miles and freckles

Answer 24

Melanin

Question 25

Lack melanin

Answer 25

Albinism

Question 26

Source of sweat

Answer 26

Eccrine glands

Question 27

Consists of coiled tubes, ducts that open to the outside of the skin

Answer 27

Eccrine glands

Question 28

Where are eccrine glands located

Answer 28

On all body regions except lips and genitalia

Question 29

Of what does sweat consist

Answer 29

``` Water Ions Wastes Acids Antibodies ```

Question 30

Enzyme in sweat that kills bacteria

Answer 30

Lysozymes

Question 31

Human scent gland

Answer 31

Apocrine gland

Question 32

Secretes oily substance located in the armpits and genitalia

Answer 32

Apocrine glands

Question 33

When do apocrine glands begin to function

Answer 33

At puberty

Question 34

Care for the hair

Answer 34

Sebaceous glands

Question 35

Release oily substance into hair follicle

Answer 35

Sebaceous gland

Question 36

Oily substance that waterproofs the epidermis and lubricates hair

Answer 36

Sebum

Question 37

How Is the adherence capability of epidermal cells as you age

Answer 37

Adhere less strongly to other cells

Question 38

As you age what happens to the cell production in the basal stratum

Answer 38

Decreases

Question 39

What happens to melanocytes as you age

Answer 39

They decrease | The remaining enlarge, cluster, and tend to form liver spots

Question 40

What happens to the dermis as you age

Answer 40

Becomes thinner and less elastic

Question 41

What happens with the blood vessels in the epidermis as you age

Answer 41

Blood vessels decrease, reducing blood flow

Question 42

A decrease in blood flow results in

Answer 42

Decreased oxygen and nutrient delivery to cells Decreased white blood cells to fight infection