Mods3

Question 1

It is considered an organ because it consists all 4 types of tissues

Answer 1

skin

Question 2

What are the two primary layers of skin?

Answer 2

epidermis and underlying dermis

Question 3

The skin performs a variety of functions: Enumerate the five.

Answer 3

protection, sensation, thermoregulation, synthesis of vitamin D, excretion

Question 4

provided against infection by microbes……

Answer 4

protection

Question 5

nerve endings for touch

Answer 5

sensation

Question 6

sweating and regulation of blood flow

Answer 6

thermoregulation

Question 7

occurs in the skin

Answer 7

synthesis of vitamin D

Question 8

salts and small amounts of waste (ammonia and urea) occur with sweat production.

Answer 8

excretion

Question 9

What are the layers of the skin?

Answer 9

Epidermis
Dermis
Hypodermis

Question 10

consists of keratinized stratified squamous epithelium

Answer 10

epidermis

Question 11

What are the four cell types present?

Answer 11

Keratinocytes
Melanocytes
Langerhans cells
Merkel cells

Question 12

produces keratin, hardens/waterproofs the skin

Answer 12

keratinocytes

Question 13

produce melanin, protects cells from UV radiation

Answer 13

melanocytes

Question 14

phagocytic macrophages that interact with blood cells during an immune response

Answer 14

Langerhans cells

Question 15

Melanin from the melanocytes is transferred to the _____?

Answer 15

keratinocytes

Question 16

… epidermal-dermal boundary
- association with nerve endings, sensory function

Answer 16

merkel cells

Question 17

What are the several layers making up the epidermis?

Answer 17

Stratum corneum
Stratum lucidum
Stratum granulosum
Stratum spinosum
Stratum Basale(stratum germinativum)

Question 18

many layers of dead, anucleate keratinocytes

Answer 18

stratum corneum

Question 19

two or three layers of anucleate cells, thick skin in foot and palms

Answer 19

stratum lucidum

Question 20

two to four layers of cells held together by desmosomes

Answer 20

stratum granulosum

Question 21

eight to ten layers of cells connected by desmosomes.

Answer 21

stratum spinosum

Question 22

a single layer of columnar cells actively dividing by mitosis

Answer 22

stratum Basale(stratum germinativum)

Question 23

What is the second layer of the skin?

Answer 23

dermis

Question 24

What are the two layers of the dermis?

Answer 24

the papillary and reticular layer

Question 25

the outer layer of areolar connective tissue with **fingerlike projections**

Answer 25

papillary layer

Question 26

dense irregular connective tissue

Answer 26

reticular layer

Question 27

fingerlike projections are called?

Answer 27

dermal papillae

Question 28

storage site of most body fat

Answer 28

hypodermis

Question 29

the third layer of the skin?

Answer 29

hypodermis

Question 30

provides thermal insualtion and absorbs shocks

Answer 30

hypodermis

Question 31

elongated filaments of keratinized epithelial cells

Answer 31

hair

Question 32

hair that is visible in skin

Answer 32

hair shaft

Question 33

penetrates the skin(epidermis and dermis)

Answer 33

hair root

Question 34

sheath that surrounds the hair in the skin

Answer 34

hair follicle

Question 35

base of the hair follicle

Answer 35

bulb

Question 36

bottom of the hair follicle

Answer 36

matrix

Question 37

smooth muscle attached to hair follicle

Answer 37

arrector pili

Question 38

keratinized epithelial cells

Answer 38

nails

Question 39

secrete sweat

Answer 39

sudoriferous (sweat) glands

Question 40

Four kinds of sudoriferous sweat glands (4)

Answer 40

merocrine, apocrine glands, ceruminous glands, mammary glands

Question 41

secrete watery solution

Answer 41

merocrine, apocrine glands, ceruminous glands, mammary glands

Question 42

armpits and pubic regions

Answer 42

apocrine glands

Question 43

cerumen(earwax)

Answer 43

ceruminous glands

Question 44

milk

Answer 44

mammary glands

Question 45

secrete sebum

Answer 45

sebaceous (oil) glands

Question 46

occur the most skin surfaces and secrete a watery solution

Answer 46

merocrine glands

Question 47

- a common type of skin cancer - slow growing - lesions begin as painless, hard, raised nodules - will metastasize

Answer 47

Squamous cell carcinoma

Question 48

- most common type of skin cancer - originates in cells at base of epidermis - lesions begins as small raised areas erode in center, bleed, and crust over -less likely to mestasitize

Answer 48

basal cell carcinoma

Question 49

most serious form of skin cancer may develop from benign

Answer 49

malignant melanoma

Question 50

a rare form of skin cancer frequently associated with aids and other....

Answer 50

Kaposi sarcoma

Question 51

The color of the hair is determined by the pigments absorbed from the ___

Answer 51

Melanocytes

Question 52

Goose bumps

Answer 52

Arrector pili

Question 53

The semilunar lighter region of the nail, the ____ is the area of new nail growth.

Answer 53

Lunula