Mastering A&p: Assignment 4

Front 1

The dermis is composed of the papillary layer and the ___________.

Back 1

reticular layer

Front 2

Cell divisions within the stratum __________ replace more superficial cells which eventually die and fall off.

Back 2

germinativum

Front 3

The cells of stratum corneum were initially produced in the __________.

Back 3

Stratum Germinativum

Front 4

The epidermal layer that consists almost entirely of keratin is the __________.

Back 4

Stratum corneum

Front 5

What structure is responsible for the strength of attachment between the epidermis and dermis?

Back 5

Epidermal ridge

(the deeper the epidermal ridge, the stronger the attachment)

Front 6

Which of these is not an accessory structure of the skin?

A) Dermis
B) Sweat glands
C) Hair follicles
D) Sebaceous

Back 6

dermis

Front 7

The layer directly beneath the epidermis is the __________.

Back 7

Dermis

Front 8

Melanocytes _______________.

Back 8

store melanin in melanosomes

Front 9

Skin exposed to ultraviolet light increases production of __________.

Back 9

Melanin

Front 10

Ultraviolet light causes production of vitamin D3 in the cells of the __________.

Back 10

Epidermis

Front 11

Too much sunlight can cause cancer, but too little can lead to a deficiency in which of these?

A) Vitamin C
B) Vitamin D3
C) Beta carotene
D) Vitamin A

Back 11

Vitamin D3

Front 12

The layer primarily responsible for the strength of the skin is the __________ layer.

Back 12

Reticular

Front 13

The skin can move easily over the underlying muscles because of the loose connective tissue within the __________.

Back 13

Hypodermis

Front 14

Which of these cells produce the fibers found within the reticular layer of the dermis?

Back 14

Fibroblasts

Front 15

The skin layer that contains areolar connective tissue is the __________ layer.

Back 15

Hypodermal

Front 16

Which of the following is NOT part of the cutaneous membrane?

A) Papillary layer
B) Epidermis
C) Hypodermis
D) Reticular Layer

Back 16

Hypodermis

Front 17

Which accessory structure is NOT found within the dermis?

A) sebaceous gland
B) arrector pili muscle
C) lamellated corpuscle
D) tactile corpuscle
E) All of the listed structures are found within the
dermis

Back 17

All of the listed structures are found within the
dermis

(Sebaceous gland, arrector pili muscle, lamellated corpuscle, tactile corpuscle)

Front 18

What structures do you find within the hypodermis?

Back 18

Fat and the cutaneous plexus

Front 19

The papillary layer is more superficial than the reticular layer of dermis. True or false?

Back 19

True

Front 20

The soft core of a hair is the __________.

Back 20

Medulla

Front 21

Which of the following glands secretes oil into the hair follicle?

A) Sebaceous
B) Eccrine
C) Ceruminous
D) Apocrine

Back 21

Sebaceous

(This oil gland secretes into the hair follicle)

Front 22

Which of the following types of glands helps cool the body?

A) Apocrine Sweat Glands
B) Ceruminous Glands
C) Merocrine Sweat Glands
D) Sebaceous Glands

Back 22

Merocrine Sweat Glands

Front 23

Merocrine sweat glands are most abundant in the __________.

Back 23

hands

Front 24

Cerumen is produced by glands located in the __________.

Back 24

Ear Canal

Front 25

Collagen to repair a deep skin wound is produced by __________.

Back 25

Dermal Fibroblasts

Front 26

The nail bed is covered by the ___________.

Back 26

Nail Body

Front 27

During which phase of injury repair is the scab undermined by epidermal cells?

Back 27

Proliferation

(During the proliferation phase, around a week after injury, the scab has been undermined by epidermal cells.)

Front 28

The process of skin repair after injury begins with ___________.

Back 28

Formation of a blood clot

Front 29

Shedding of the scab and completion of the epidermis occurs during which phase of injury repair?

Back 29

Maturation

Front 30

Mast cells are triggering a response to injury during which phase of repair?

Back 30

Inflammatory

(Mast cells are key to triggering the inflammatory phase immediately after injury)

Front 31

Why are the elderly more prone to skin infections?

Back 31

1. They have a thinner epidermis
2. Tissue repairs take longer
3. They have fewer dendritic cells

(all of these age-related changes increase susceptibility to skin infections)

Front 32

Damage to elastic fibers in the skin of the elderly results in __________.

Back 32

Wrinkles

Front 33

____________ represent a link between the integumentary and the lymphoid systems.

Back 33

Dendritic Cells