Final answer:
True, a medium-grit abrasive is indeed used for initial shaping of the perimeter of the nail, and nails are primarily composed of the protein keratin.
Step-by-step explanation:
The statement that a medium-grit abrasive is used for initial shaping of the perimeter of the nail is True. When performing a professional manicure, the process often begins with the shaping of the nails.
Using a medium-grit abrasive file, a technician can effectively shape the nail's perimeter. Once the initial shaping is completed, finer grit files may be used to smooth the nail edge, ensuring a clean and polished look.
It is also useful to note that nails are composed mainly of a protein called keratin, which is the correct answer to the second question provided.
The statement is true. A medium-grit abrasive is indeed used for initial shaping of the perimeter of the nail. When shaping the nails, we often use different types of nail files or abrasives. Medium-grit abrasives have a rough texture that allows them to remove extra length and shape the nails.
For example, when you want to adjust the shape of your nails or shorten them, you can use a medium-grit abrasive to gently file the perimeter of the nail. By moving the abrasive in one direction, you can shape the nails and achieve the desired length.