Ch 11 Flashcards
The hair, skin, nails, and glands are part of the _____ system.
a. epidermal
b. integumentary
c. endocrine
d. lymphatic
b. integumentary
What structures contain the blood and nerve supply that provide the nutrients needed for hair growth?
a. Sebaceous glands
b. Dermal papillae
c. Hair bulbs
d. Furuncles
b. Dermal papillae
The body naturally produces _____ of the 20 amino acids that make up hair.
a. 3
b. 9
c. 11
d. all
c. 11
A lengthwise section of hair shows that cuticle scales overlap and each individual cuticle scale is attached to the _____.
a. medulla
b. melanin
c. cortex
d. root
c. cortex
Which term refers to a layer that protects the hair from penetration and prevents damage to hair fibers?
a. Hair cuticle
b. Cortex
c. Hair follicle
d. Medulla
a. Hair cuticle
The fibrous protein core formed by elongated cells that contains melanin pigment is the _____.
a. cuticle
b. sebum
c. cortex
d. medulla
c. cortex
The changes involved in oxidation haircoloring, wet setting, thermal styling, permanent waving, and
chemical hair relaxing take place within the _____.
a. cuticle
b. cortex
c. medulla
d. dermal papilla
b. cortex
Hair is composed of protein that grows from cells originating within the _____.
a. hair bulb
b. hair follicle
c. dermal papilla
d. medulla layer
b. hair follicle
The hair shaft that emerges from the scalp is a nonliving fiber composed of _____.
a. keratinized acids
b. hydrogen bonds
c. melanin protein
d. keratinized protein
d. keratinized protein
Hair is approximately _____ percent protein.
a. 30
b. 50
c. 70
d. 90
d. 90
A physical side bond that is easily broken by water and heat is a _____ bond.
a. nitrogen
b. hydrogen
c. disulfide
d. sulfur
b. hydrogen
What type of bond is broken by wetting the hair with water and is reformed when the hair dries?
a. Salt bond
b. Hydrogen bond
c. Disulfide bond
d. Peptide bond
b. Hydrogen bond
A weak, physical, cross-link side bond between adjacent polypeptide chains that is broken by changes in pH is a _____ bond. a. hydrogen
b. carbon
c. salt
d. sulfur
c. salt
Permanent waving and hair relaxers change the shape of hair by chemically altering the hair’s _____.
a. hydrogen bonds
b. ionic bonds
c. disulfide bonds
d. amino acids
c. disulfide bonds
Hydroxide chemical relaxers break disulfide bonds and convert them to _____ bonds.
a. lanthionine
b. sulfur
c. carbon
d. hydrogen
a. lanthionine