The three different types of side bonds that link chains of amino acids together are _____.

Which of the following best describes a procedure a cosmetologist could use to determine how quickly hair will process during chemical servicing?

What are the two parts of a strand of human hair?

All of the following are living portions of hair that are below the skin surface EXCEPT __________.

Choose the picture that most closely matches what you observe at TP9.

What is the outermost layer of hair?

The measurement that describes the number of individual hair strands on 1 square inch of the scalp is hair _____.

Which statement best describes what may have happened to cause a client’s hair to grow in a whorl pattern?

In which phase of the hair growth cycle does the follicle canal shrink and detach from the dermal papilla?

Which part of the living portion of the hair is defined as the structure in the skin or scalp that surrounds the hair root and anchors the hair in the skin?