The ability of the hair to absorb moisture is hair _____.

Which of the following can be a cause of dry hair and dry scalp?

Which of the following conclusions can a cosmetologist make if a client expresses concern about not being able to grow the hair beyond shoulder length?

In “Dr. Heidegger’s Experiment,” where does the water they drink come from?

Each of the following is a layer of the hair shaft structure EXCEPT ______.

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.