Polypeptide chains are cross-linked together by these side bonds - Hydrogen, salt, and disulfide
bonds
The lower part of the hair root is the club-shaped - Hair bulb
The dermal papilla contains the blood and nerve supply that provides - Nutrients
The two main divisions of the hair are the hair ...
Hair & Scalp Care
Polypeptide chains are cross-linked together by these side bonds - Hydrogen, salt, and disulfide
bonds
The lower part of the hair root is the club-shaped - Hair bulb
The dermal papilla contains the blood and nerve supply that provides - Nutrients
The two main divisions of the hair are the hair shaft and the - Hair root
The hair root is made up of three main structures, the follicle , bulb, and - Dermal papilla
The follicle is the tube-like depression in the skin that contains the - Hair root
At the base of the follicle is a tiny involuntary muscle called the - Arrector pili
The sebaceous glands secrete a substance called - Sebum
The hair shaft is made up of three layers; the cuticle, cortex , and - Medulla
A healthy, compact cuticle serves as the hair's - Primary defense
The layer of hair that is generally only present in thick, coarse hair is the - Medulla
90% of the hairs weight is found in the - Cuticle
Swelling the hair raises allows liquids to penetrate by raising the - Cuticle
, Permanent haircolors, perm solutions, and chemical relaxers must have an akaline ph in order to -
Penetrate the cuticle layer
Permanent waving, chemical relaxing, and oxidation haircoloring cause changes that occur in the -
Cortex
By the time the hair shaft emerges from the scalp ,its cells are keratinized and - Are no longer
living
Hair is made up of five elements; carbon, nitrogen, hydrogen, oxygen, and - Sulfur
A closely groomed beard and mustache may look good on - A balding male client
The branch of science that focuses on the hair , its diseases, and its care is called - Trichology
Of the five elements in human hair , the element that makes up the lowest percentage is - Sulfur
Amino acids are linked together by chemical bonds - Peptide bonds
Side bonds account for the hair's - Elasticity
Compared to hydrogen and salt bonds, disulfide bonds are - Stronger
Permanent waving and chemical hair relaxing change the shape of the hair by chemically changing the -
Disulfide bonds
The agents that easily break hydrogen bonds are - Water or heat
The ratio of eumelanin to pheomelanin determines - Natural hair color
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