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A weak, physical, cross-link side bond between adjacent polypeptide chains that is broken by changes in pH is a:

Which of the following scalp disorders is characterized by dry, sulfur-yellow, cup-like crusts on the scalp?

The thickness or diameter of the individual hair strand is referred to as hair:

Trichoptilosis is the technical term for:

The three different types of side bonds are:

The melanin that provides brown or black color to hair is:

There are 60 naturally occurring elements, each with its own distinct physical and chemical properties.

Rapid and interrupted current that flows in one direction and then in the opposite direction is:

The fibrous protein core formed by elongated cells that contains melanin pigment is the:

Which of the following terms is used to describe hair’s wave pattern?