Chapter 5: Quiz 3

Question 1

Nutrients reach the surface of the skin (epidermis) through the process of ________.

Answer 1

diffusing through the tissue fluid from blood vessels in the dermis

Question 2

Which type of skin cancer appears as a scaly reddened papule and tends to grow rapidly and metastasize?

Answer 2

Squamous cell carcinoma

Question 3

Keratinocytes are an important epidermal cell because they ________.

Answer 3

produce a fibrous protein that gives the skin much of its protective properties

Question 4

Melanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes ________.

Answer 4

accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer

Question 5

The epidermis consists of five layers of cells, each layer with a distinct role to play in the health, well-being, and functioning of the skin. Which of the following layers is responsible for cell division and replacement?

Answer 5

Stratum basale

Question 6

The dermis is a strong, flexible connective tissue layer. Which of the following cell types are likely to be found in the dermis?

Answer 6

fibroblasts, macrophages, and mast cells

Question 7

The dermis has two major layers; which of the following constitutes 80% of the dermis and is responsible for the tension lines in the skin?

Answer 7

The reticular layer

Question 8

The design of a person’s epidermal ridges is determined by the manner in which the papillae rest upon the dermal ridges to produce the specific pattern known as handprints, footprints, and fingerprints. Which of the following statements is true regarding these prints or ridges?

Answer 8

They are genetically determined, therefore unique to each person.

Question 9

An epidermal dendritic cell is a specialized ________.

Answer 9

Phagocytic cell

Question 10

What are the most important factors influencing hair growth?

Answer 10

Nutrition and hormones

Question 11

A physician is often able to detect homeostatic imbalances in the body by observing changes in the skin color.

Answer 11

True

Question 12

When an individual is exposed to extremely low air temperatures, the dermal blood vessels will dilate so that blood and heat will be dissipated.

Answer 12

False

Question 13

Regardless of race, all human beings have about the same number of melanocytes.

Answer 13

True

Question 14

The pinkish hue of individuals with fair skin is the result of the crimson color of oxygenated hemoglobin (contained in red blood cells) circulating in the dermal capillaries and reflecting through the epidermis.

Answer 14

True

Question 15

Sweat glands continuously produce small amounts of sweat, even in cooler temperatures.

Answer 15

True