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Chapter 9
Nail Structure and Growth
Question | Answer |
---|---|
The appearance of the nails can reflect the general health of the body. | True |
The keratin in natural nails is softer than the keratin in hair. | False |
The water content of a healthy nail is between 5 and 10 percent. | False |
Nail plates need oxygen, vitamins, and minerals. | False |
Toenails are thicker and harder than fingernails because the toenail matrix is longer than the fingernail matrix. | True |
Ordinarily, replacement of a natural toenail takes about 4 to 6 months. | False |
The natural nail is part of what system? | integumentary |
The water content of the natural nail directly affects the nail’s: | flexibility |
The most visible and functional part of the nail unit is the: | nail plate |
The nail plate is constructed of how many layers of nail cells? | 100 |
The part of the nail plate that extends over the tip of the finger or toe is called the: | Free Edge |
The portion of living skin that supports the nail plate is the: | Nail Bed |
The nail bed contains many nerves and is attached to the nail plate with a thin layer of tissue called the: | bed epithelium |
The area of the nail where the nail plate cells are formed is the: | matrix |
The dead, colorless tissue attached to the natural nail plate is the: | cuticle |
The living skin at the base of the nail plate covering the matrix area is the: | eponychium |
The slightly thickened layer of skin that lies between the fingertip and the free edge of the natural nail plate is the: | hyponychium |
The tough band of fibrous tissue that connects bones or holds an organ in place is the: | ligament |
Normal, healthy nails grow in a variety of shapes, depending upon the shape of the: | matrix |
The average rate of nail growth in the normal adult is about: | 1/10 inch per month |
A hardened keratin plate that sits on and covers the nail bed | Nail plate |
Also known as the onyx, composed mainly of keratin | Natural nail |
Fold of skin overlapping the side of the nail | Lateral nail fold |
Visible part of the matrix that extends from underneath the living skin | Lunula |
The slits or furrows on the sidewall of the nail | Nail grooves |