Ch 5 nail structure and growth

Cosmetologists should have a thorough understanding of nail structure and growth because __________.

• they are physicians specialized in a medical branch of science that involves the study of nails and their structure

• they must be able to differentiate between the nail cuticle and the eponychium before performing nail services

• they are responsible for informing clients about the parts of the nails that will be affected as a result of the nail services offered by them

• it will help them diagnose, prescribe medications for, and provide treatment for nail diseases

Identify a reason why cosmetologists should be knowledgeable about nail structure and growth.

• Understanding nail structure helps cosmetologists diagnose and treat irregular nail conditions.

• Cosmetologists are responsible for imparting the biological aspects of nail structure to staff members.

• Understanding natural nail structure and growth cycles prepares cosmetologists for advanced nail services.

• Cosmetology is the branch of medicine dealing with the natural nail unit and its major parts.

The natural nail unit includes __________.

• all parts of the finger from the tip to the second knuckle

• all parts of the finger from the tip to the first knuckle

• only the tip of the finger

• the nail plate and the nail bed but excludes the cuticle

The natural nail is technically called the __________.

• hyponychium

• lunula

• cuticle

• onyx

The natural nail unit is mainly made up of __________, which is the fiber-shaped protein found in skin and hair.

• collegen

• elastin

• melanin

• keratin

The nail bed, nail fold, eponychium, paronychium, and hyponychium are collectively referred to as the __________.

• cuticle

• bed epithelium

• perionychium

• lunula

The __________ is the whole skin flap that covers the matrix, from the visible nail plate's edge to the first joint of the finger or toe.

• proximal nail fold

• bed epithelium

• perionychium

• lateral nail fold

The __________ is the section of living skin that supports the nail plate as it extends toward the free edge.

• cuticle

• eponychium

• nail matrix

• nail bed

The __________ is part of the natural nail that contains nerves, blood vessels, and lymph to nourish cells that differentiate and become keratinized to form the nail plate.

• cuticle

• matrix

• hyponychium

• eponychium

Which of the following statements best describes the lunula?

• It is the thin tissue layer between the nail plate and the nail bed.

• It is the nonliving colorless tissue attached to the nail plate.

• It is the section of living skin that supports the nail plate as it extends toward the free edge.

• It is the whitish, half-moon shape under the nail plate's base.