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Which of the following best describes how a disulfide bond in human hair is formed?

Which component of hair is defined as the thickness or diameter of an individual hair strand?

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

The hair, skin, nails, and glands are part of the _____ system.

Which of the following is a situation in which a cosmetologist would allow the hair to cool before styling?

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

Which sentence best describes the medulla?

Which layer of the hair shaft provides strength, elasticity, and color?

What are the major chemical elements that make up human hair?

What is the growth phase during which new hair is produced?