5. Integumentary System

The two major components of the dermis are the

(a) Superficial fascia and cutaneous membrane

(b) Epidermis and subcutaneous layer

(c) Papillary layer and reticular layer

(d) Stratum basale and stratum corneum

The pigment hemoglobin in red blood cells gives light-colored skin a pinkish hue when it binds large amounts of oxygen.

The epidermis provides a physical barrier due largely to the presence of

a. Melanin

b. Carotene

c. Collagen

d. Keratin

Which epidermal cell type is most numerous?

a. Keratinocyte

b. Melanocyte

c. Dendritic cell

d. Tactile epithelial cell

Which cell functions as part of the immune system?

a. Keratinocyte

b. Melanocyte

c. Dendritic cell

d. Tactile epithelial cell

Identify the different portions (a–d) of the cutaneous membrane and the underlying layer of loose connective tissue (e) in the diagram to the right.

c. ____

Why is it important for a surgeon to choose—when possible—an incision pattern according to the skin's tension lines?

Identify the different portions (a–d) of the cutaneous membrane and the underlying layer of loose connective tissue (e) in the diagram to the right.

b. ____

Which is not a true statement about the papillary dermis?

a. It is largely areolar connective tissue

b. It is most responsible for the toughness of the skin

c. It contains nerve endings that respond to stimuli

d. It is highly vascular

Imagine you're a doctor, and a patient comes to you with a rare medical condition. It seems that their epidermal cells are not producing keratin. Which of the following symptoms are they most likely to experience?

The rule of nines is helpful clinically in

a. Diagnosing skin cancer

b. Estimating the extent of a burn

c. Estimating how serious a cancer is

d. Preventing acne

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Merkel cells produce the pigment melanin.

In which layer(s) of the epidermis does cell division occur?

Match the appropriate structure with the proper description and/or function.

1. Made of dense, irregular connective tissue

 2. Produce sebum

3. Helps regulate body temperature by producing sweat

4. Cause fingerprints

5. Houses the hair root

6. Superficial keratinized stratified squamous epithelium

7. Deep pressure receptors

8. Vascular layer that houses skin appendages

a. Dermal papillae

b. Lamellar corpuscles

c. Dermis

d. Hair follicle

e. Epidermis

f. Eccrine sweat gland

g. Reticular layer

h. Sebaceous glands