Ch 4- Integumentary System

Question 1

The cutaneous membrane of the skin is made up of what?

Answer 1

The epidermis and dermis

Question 2

The dermis is made up of what layers?

Answer 2

Papillary layer and reticular layer

Question 3

What are the accessory structures of the skin?

Answer 3

Hair follicles, exocrine glands, nails

Question 4

What kind of epithelium makes up the epidermis?

Answer 4

Stratified squamous epithelium

Question 5

What are the four cell types found in the epidermis?

Answer 5

Keratinocytes, melanocytes, merkel cells, and langerhan cells

Question 6

What are the five layers of the epidermis?

Answer 6

Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum

Question 7

Which layer of the epidermis is only found in thick skin?

Answer 7

Stratum lucidum

Question 8

Where is thick skin found?

Answer 8

On the surfaces of the palms and soles of feet

Question 9

What are epidermal ridges?

Answer 9

Fingerprints

Question 10

What forms the epidermal ridges?

Answer 10

The dermal papilla in the dermis

Question 11

What kind of structures form through invagination or unfolding of the epidermis (during embryonic development)?

Answer 11

Accessory structures

Question 12

What are epithelial cells that surround the papilla?

Answer 12

Hair bulb

Question 13

Surrounded by epithelium and contains capillaries and nerves

Answer 13

Hair papilla

Question 14

The inner medulla of the hair is?

Answer 14

Soft and flexible keratin

Question 15

The outer cortex of the hair is?

Answer 15

Hard keratin - stiff

Question 16

Dead, keratinized cells that coats the hair is?

Answer 16

Cuticle

Question 17

Surrounds the hair root and the deeper portion of the shaft. Cells here die quickly and this layer does not extend the entire length of the hair follicle

Answer 17

Internal root sheath

Question 18

Extends from the skin surface to the hair matrix

Answer 18

External root sheath

Question 19

A thickened, clear layer wrapped in the dense connective tissue sheath of the follicle as a whole

Answer 19

Glassy membrane

Question 20

What are the functions of exocrine glands?

Answer 20

Assist in thermoregulation, excrete wastes, and lubricate epidermis

Question 21

What are the two types of exocrine glands?

Answer 21

Sebaceous and sweat glands

Question 22

Secretes oily lipid(sebum) that coats hair shaft and epidermis, provides lubrication and antibacterial action

Answer 22

Sebaceous glands

Question 23

Produces watery solution by merocrine secretion, flushes epidermal surface, and performs other special functions

Answer 23

Sweat glands

Question 24

Secretes into hair follicles

Answer 24

Typical sebaceous glands

Question 25

Secretes onto skin surface

Answer 25

Sebaceous follicles

Question 26

Widespread, produces thin secretions, mostly water. Controlled by nervous system and important for thermoregulation and excretion. Some antibacterial action occurs.

Answer 26

Merocrine sweat glands

Question 27

Produces viscous secretion of complex composition, strongly influenced by hormones, further subdivided into two glands

Answer 27

Apocrine sweat glands

Question 28

Secretes waxy cerumen into external ear canal

Answer 28

Ceruminous glands

Question 29

Apocrine glands specialized for milk production

Answer 29

Mammary glands

Question 30

Covers the nail bed

Answer 30

Nail body

Question 31

Pale crescent shape on nail

Answer 31

Lunula