Chapter 3 Skin Structure and Growth

30 Study Guide Questions

All of the following are reasons cosmetologist should understand skin structure and growth EXCEPT:

Diagnosing and providing treatment for abnormal skin conditions, illnesses, or diseases requires knowledge of skin structure and growth.

What is the underlying or inner layer of the skin?

Dermis

Which layer of the epidermis forms unique fingerprints and footprints and is only located on the palms of the hands, the soles of the feet, and the digits?

Stratum Lucidum

What gives the body smoothness and contour while providing a protective cushion for the skin?

Subcutaneous Tissue

Nerve fibers that send messages to the central nervous system and brain to react to heat, cold, touch, pressure, and pain are called ________.

Sensory Nerve Fibers

Which nerve fibers in the skin stimulate muscles?

Motor Nerve Fibers

Which sentence best defines melanin?

The tiny grains of pigment are produced by melanocytes in the stratum germinativum.

A broad-spectrum sunscreen is one that _______.

Has been shown to protect against UVA and UVB radiation from the sun.

Which sentence best describes the difference in the functions of pheomelanin and eumelanin in the skin?

A person with predominantly pheomelanin tends to have rosy skin, whereas a person with predominantly eumelanin tends to have cooler skin tones.

Which response describes a cause of wrinkles or sagging skin?

Collagen fibers lose their strength due to exposure to UV light.

Which two structures give the skin strength, form, and flexibility?

Collagen and Elastin

What is the function of elastin?

It gives the skin flexibility and elasticity.

Which is a reasonable prediction of an outcome for a client who does not use a broad-spectrum sunscreen with a sun protection factor (SPF) of 15 or higher?

Collagen and elastin fibers will weaken, and the client's skin will age prematurely.

Wanda's skin has recently been experiencing a significant amount of new wrinkles. What could explain these new wrinkles?

Wanda has recently been working at an outdoor job that requires frequent exposure to very cold temperatures, which weakens collagen fibers.

What is the function of sebaceous glands?

To secrete oil to lubricate the skin.

What is the function of sudoriferous glands?

To excrete sweat to regulate body temperature and eliminate waste products.

Lately, a client has noticed body sweat much more than typical in the past. Which situation could explain this increased perspiration?

The client is taking a new prescription drug.

All of the following describe a defense mechanism the skin uses to protect the body EXCEPT:

Hair follicles pull bacteria from the surface of the skin.

Which example illustrates the skin's heat regulation function?

Sudoriferous glands excrete perspiration.

Water loss through perspiration is an example of which function of the skin?

Excretion

The medical branch of science that deals with the study of the skin, its functions, and diseases is ________.

Dermatology

The layer of skin that is seen and treated by the cosmetologist is the ______.

Stratum Corneum

What is a fibrous protein that is the principal component of hair and nails?

Keratin

Which type of nerve fibers carry impulses from the brain to the muscles?

Motor

The melanin produced by the body that is red to yellow in color is ______.

Pheomelanin

_______ helps protect sensitive cells from UV rays.

Melanin

All of the following are skin functions EXCEPT _________.

Add necessary body weight to maintain good health

The fibrous protein that gives skin its flexibility and helps skin regain its shape after being expanded is _______.

Elastin

Oil glands that are connected to hair follicles are also called ______.

Sebaceous Glands

Water is the number one nutrient of the body and composes what percentage of the body's skin?

50 to 70 percent