CHAPTER 3-9

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, soles of 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

Sensory nerve fibers

Which nerve fibers in the skin stimulate muscles?

Motor nerve fibers

What best defines melanin?

Tiny grains of pigment produced by melanocytes in the stratum germinativum

Difference in functions of pheomelanin and eumelanin in the skin

Pheomelanin tends to have rosy skin, whereas eumelanin tends to have cooler skin tones

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

Reasonable prediction of an outcome for a client who does not use a broad-spectrum sunscreen with a sun protection factor of 15 or higher?

Collagen and elastin fibers will weaken and the 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 been recently been working outside that requires frequent exposure to very cold temperatures which weakens collagen fibers

What is the function of subcutaneous glands?

To secret oil to lubricate the skin

What is the function of sudoriferous glands?

To excrete sweat to regulate body temperature and eliminate waste products

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

Excretion

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

Stratus corneum

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

Pheomelanin

This helps protect sensitive cells from UV rays

Elastin

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

Elastin

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

50-90%

The visible difference in lesions that can be used to classify the lesion as either a primary or secondary lesion

Primary lesions are a different color than the surrounding skin, whereas secondary lesions have an accumulation of material on the skin surface

Disorders of the sudoriferous glands

Anhidrosis, ahyperhidrosis, malaria rubra