Art-labeling activity: the structure of the epidermis

Part A

Diagram of a cross-section of skin. The top, darker layer consisting of several layers of cells and is labeled D. The bottom, pink layer contains collagen fibers, lamellated corpuscles, tactile corpuscles and blood vessels. Its upper border is folded into projections that house blood vessels. The projections are labeled A. The entire pink layer is divided into an upper, thinner portion and a lower, thicker portion. The upper portion is labeled B, the lower portion is labeled C.

The reticular layer of the dermis is labeled _____.

ANSWER:

Diagram of a cross-section of skin. The top, darker layer consisting of several layers of cells and is labeled D. The bottom, pink layer contains collagen fibers, lamellated corpuscles, tactile corpuscles and blood vessels. Its upper border is folded into projections that house blood vessels. The projections are labeled A. The entire pink layer is divided into an upper, thinner portion and a lower, thicker portion. The upper portion is labeled B, the lower portion is labeled C.

The reticular layer of the dermis is labeled _____.

A

B

C

D

Art-based Question Unit 7 Question 3

Part A

Diagram of a large cell surrounded by 6 keratinocytes. There are numerous “arms” that reach out and contact the keratinocytes. There is also a large central nucleus, RER and Golgi apparatus. There are vesicles with dark inclusions inside the large cell, which release their product into the surrounding keratinocytes.

The large cell in the middle is a __________.

ANSWER:

Diagram of a large cell surrounded by 6 keratinocytes. There are numerous “arms” that reach out and contact the keratinocytes. There is also a large central nucleus, RER and Golgi apparatus. There are vesicles with dark inclusions inside the large cell, which release their product into the surrounding keratinocytes.

The large cell in the middle is a __________.

melanocyte

merkel cell

basal cell

fibroblast

Art-labeling Activity: Structure of the epidermis

Part A

Drag the appropriate labels to their respective targets.

ANSWER:

Stratum basale

Stratum spinosum

Keratinocytes

Dendritic cell

Sloughing keratinocytes

Stratum corneum

Stratum lucidum (found only in thick skin)

Melanocyte

Stratum granulosum

Dermis

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Clinical Scenario: The Skin and Burns

Kim enjoys baking cookies for the holidays. She often makes dozens of cookies with her mother and they both enjoy the time together and, of course, the delicious cookies! One afternoon during their annual cookie bake as Kim talks to her mother about her anatomy and physiology class, the timer went off and her mother distractedly grabbed the cookies from the oven. She quickly dropped them when the hot cookie sheet burned her hand through an unnoticed hole in her oven mitt. “Ouch!” she exclaimed and quickly ran her hand under cool water from the sink. When Kim looked at her mother’s hand she noticed several small blisters forming on two fingers.

Part A

The superficial layer of the skin is the epidermis. It is organized into layers (otherwise known as strata). Thick skin contains five layers while thin skin contains four. Drag and drop the correct layer of the epidermis with its location in the picture.

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ANSWER:

Stratum spinosum

Stratum granulosum

Stratum basale

Stratum corneum

Stratum lucidum

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Part B

The skin also contains a deeper layer known as the dermis. The epidermis and dermis have unique features and characteristics. Sort each characteristic with its appropriate layer of the skin.

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ANSWER:

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· is vascular

· consists of stratified squamous epithelial tissue

· contains sensory receptors

· consists of dense irregular connective tissue

· regenerates quickly

· contains many cells arranged in a "sheet"

· Epidermis

· Dermis

· Both epidermis and dermis

Part C

A burn damages the skin due to heat, chemical, or electrical exposure. Burns are generally classified by severity as first (superficial), second (partial thickness), or third (full thickness) degree. Match each type of burn with its characteristics.

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ANSWER:

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· First-degree (superficial burn)

· Second-degree (partial thickness burn)

· Third-degree (full thickness burn)

· : Often causes pain and blistering of the skin.

· : Often little pain is felt due to destruction of nerves and underlying tissue.

· : Characterized by redness and pain such as a sunburn.

Part D

Which type of burn did Kim’s mother have?

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ANSWER:

Which type of burn did Kim’s mother have?

First-degree

Second-degree

Third-degree

Part E

In this case, Kim’s mother’s burn formed blisters. These blisters are often closed and fluid filled. Recall that a first-degree burn is characterized by redness, not blisters. Why do you think a first-degree burn does not blister?

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ANSWER:

In this case, Kim’s mother’s burn formed blisters. These blisters are often closed and fluid filled. Recall that a first-degree burn is characterized by redness, not blisters. Why do you think a first-degree burn does not blister?

A first-degree burn destroys blood vessels so no fluids are lost.

A first-degree burn damages the dermis but is avascular so fluids are not lost from the blood.

A first-degree burn only affects the epidermal layer and does not penetrate to the dermis.

Part F

A third-degree burn is a very severe burn. It can cause additional complications in the body. Choose all possible concerns that may occur due to a third-degree burn.

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ANSWER:

A third-degree burn is a very severe burn. It can cause additional complications in the body. Choose all possible concerns that may occur due to a third-degree burn.

dehydration

decreased bone density

infection

electrolyte imbalances

difficulty maintaining body temperature

Lab Manual Unit 7 Post-Lab Quiz Question 2

Part A

https://session.masteringaandp.com/problemAsset/2126537/1/7870007001_u7a1_prelab.jpg Identify the structure labeled "c."

ANSWER:

https://session.masteringaandp.com/problemAsset/2126537/1/7870007001_u7a1_prelab.jpg Identify the structure labeled "c."

dense irregular connective tissue

papillary layer

reticular layer

hypodermis

Lab Manual Unit 7 Post-Lab Quiz Question 4

Part A

https://session.masteringaandp.com/problemAsset/2126539/1/7870007001_u7a1_prelab.jpg Identify structure labeled "g."

ANSWER:

https://session.masteringaandp.com/problemAsset/2126539/1/7870007001_u7a1_prelab.jpg Identify structure labeled "g."

lamellated corpuscle

arrector pili muscle

apocrine gland

hair shaft

Lab Manual Unit 7 Post-Lab Quiz Question 6

Part A

What is the primary type of tissue is found in the reticular layer of the dermis?

ANSWER:

What is the primary type of tissue is found in the reticular layer of the dermis?

areolar connective tissue proper

adipose

stratified squamous epithelium

dense irregular connective tissue proper

Lab Manual Unit 7 Post-Lab Quiz Question 8

Part A

Which gland is located across most of the body and is responsible for body thermoregulation?

ANSWER:

Which gland is located across most of the body and is responsible for body thermoregulation?

apocrine

ceruminous

sebaceous

eccrine

Lab Manual Unit 7 Pre-Lab Quiz Question 2

Part A

https://session.masteringaandp.com/problemAsset/2126377/1/7870007001_u7a1_prelab.jpg Identify the structure labeled "c."

ANSWER:

https://session.masteringaandp.com/problemAsset/2126377/1/7870007001_u7a1_prelab.jpg Identify the structure labeled "c."

dermis

hypodermis

sebaceous gland

epidermis

Lab Manual Unit 7 Pre-Lab Quiz Question 4

Part A

Which layer of the epidermis is the deepest?

ANSWER:

Which layer of the epidermis is the deepest?

stratum corneum

stratum granulosum

stratum spinosum

stratum basale

Lab Manual Unit 7 Pre-Lab Quiz Question 5

Part A

Thick skin:

ANSWER:

Thick skin:

is found on the palms/soles of the hands/feet

is composed solely of melanocytes

contains six layers or strata

has a very thick stratum basale

Lab Manual Unit 7 Pre-Lab Quiz Question 6

Part A

Which structure is found in the epidermis?

ANSWER:

Which structure is found in the epidermis?

collagen

melanocyte

blood vessel

sebaceous gland

Lab Manual Unit 7 Pre-Lab Quiz Question 7

Part A

Which structure is found in the dermis?

ANSWER:

Which structure is found in the dermis?

sweat gland

dendritic cell

melanocyte

keratinocyte

Lab Manual Unit 7 Pre-Lab Quiz Question 8

Part A

Which structure is found in the epidermis?

ANSWER:

Which structure is found in the epidermis?

lamellated corpuscle

sweat gland

keratinocyte

sebaceous gland

Lab Manual Unit 7 Pre-Lab Quiz Question 9

Part A

Which statement is true regarding hair?

ANSWER:

Which statement is true regarding hair?

The cells found in the hair that extends out of the skin are living.

The cells found in the shaft are dead.

The hair root is located in the epidermis.

The cells are non-keratinized to maintain softness.

Lab Manual Unit 7 Pre-Lab Quiz Question 10

Part A

Where are apocrine glands found?

ANSWER:

Where are apocrine glands found?

forehead

palms of hands

on the scalp

the axilla

Lab Manual Unit 7 Post-Lab Quiz Question 9

Part A

Which layer of the epidermis undergoes continual mitosis?

ANSWER:

Which layer of the epidermis undergoes continual mitosis?

stratum granulosum

stratum basale

stratum spinosum

stratum lucidum

Lab Manual Unit 7 Post-Lab Quiz Question 10

Part A

Which stratum of the epidermis is only found in the thick skin of the palms of the hands and soles of the feet?

ANSWER:

Which stratum of the epidermis is only found in the thick skin of the palms of the hands and soles of the feet?

stratum lucidum

stratum basale

stratum spinosum

stratum corneum

Lab Manual Unit 7 Post-Lab Quiz Question 11

Part A

Why are "henna tattoos" of the epidermis not permanent like other tattoos?

ANSWER:

Why are "henna tattoos" of the epidermis not permanent like other tattoos?

Regular tattoos inject their ink into the mitotic epidermal cells making the dye permanent.

The epidermis is continually renewing its keratinocytes of sloughing off the old cells.

The epidermis's dendritic cells phagocytize/remove the henna stain.

The henna stain is water soluble and excreted with sweat as a byproduct.

Lab Manual Unit 7 Pre-Lab Quiz Question 11

Part A

Which is a characteristic of apocrine glands but not eccrine glands?

ANSWER:

Which is a characteristic of apocrine glands but not eccrine glands?

open into hair follicles

located in the epidermis

found on the hands and feet

primary function is to regulate body temperature

Lab Manual Unit 7 Post-Lab Quiz Question 12

Part A

Where are eccrine glands the most dense and active?

ANSWER:

Where are eccrine glands the most dense and active?

palms of the hands

forehead

forearm

The glands are evenly distributed.

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