Chapters 10-12 Flashcards
Which of the following is the tube-like depression or picket in the skin or scalp that contains the hair root?
A) arrector pili
B) hair follicle
C) dermal papilla
D) hair bulb
B) hair follicle
The lower part of the hair bulb is hollow and fits over and covers the __________________.
A) dermal papilla
B) endocrine glands
C) arrector pili
D) sebaceous glands
A) dermal papilla
Which of the following contains the blood and nerve supply that provides the nutrients needed for hair growth?
A) dermal papilla
B) arrector pili
C) cortex
D) medulla
A) dermal papilla
Overactive sebaceous glands that secrete too much sebum can cause what type of scalp condition?
A) scale-like
B) dry
C) oily
D) flakey
C) oily
Hair follicles are distributed all over the body, with the exception of the palms of the hands and the ______________.
A) fingers
B) top of the feet
C) ears
D) soles of the feet
D) soles of the feet
The outermost layer of the hair is the ________________.
A) cortex
B) follicle
C) cuticle
D) medulla
C) cuticle
What percentage of the total weight of the hair comes from the cortex?
A) less than 10 percent
B) 90 percent
C) 51 percent
D) 40 percent
B) 90 percent
What layer of hair may be absent in very fine and naturally blond hair?
A) medulla
B) cuticle
C) cortex
D) keratin
A) medulla
A healthy, compact cuticle is responsible for the _____________of the hair.
A) waviness
B) thickness
C) color
D) shine and silkiness
D) shine and silkiness
The cortex’s unique _____________________ provides strength, elasticity, and natural color to the hair.
A) pigment
B) protein structure
C) texture
D) chemical composition
B) protein structure
Protein is made of chemical units called __________________.
A) hydroxids
B) pH
C) amino acids
D) disulfides
C) amino acids
The hair shaft is a non living fiber composed of ______________.
A) sebum
B) melanin pigment
C) round cells
D) keratinized protein
D) keratinized protein
The spiral shape of a coiled protein is called a ______________.
A) helix
B) chain
C) bond
D) cysteine
A) helix
What type of a side bond is a weak, physical, cross-link side bond that is easily broken by water or heat?
A) oxygen
B) disulfide
C) hydrogen
D) salt
C) hydrogen
A salt bond is a weak, physical side bond, which cross-links the polypeptide chains, but it reacts to changes in _________________.
A) pH
B) hormones
C) temperature
D) oxidation
A) pH
Disulfide bonds are broken by ____________.
A) heat
B) water
C) chemical relaxers
D) pH
C) chemical relaxers
Natural hair color is the result of the _______________ found within the cortex.
A) COHNS elements
B) amino acids
C) chemical cross bonds
D) melanin pigment
D) melanin pigment
Natural hair wave patterns are the result of ________________.
A) hormonal changes
B) genetics
C) age
D) melanin pigment
B) genetics
What type of hair often has low elasticity, breaks easily, and has a tendency to knot, especially on the ends?
A) extremely curly
B) extremely straight
C) wavy
D) curly
A) extremely curly
The more disulfide bonds in the hair the more resilient it will be to _____________.
A) turning gray
B) detangling
C) daily hair loss
D) chemical processes
D) chemical processes
During what cycle of hair growth is new hair grown?
A) Anagen
B) androgen
C) telogen
D) Catagen
A) anagen
A __________ is a tuft of hair that stands straight up.
A) vellus
B) hair stream
C) cowlick
D) whorl
C) cowlick
What type of hair is the, coarse hair found on the scalp, legs, arms, and bodies of males and females?
A) vellus
B) lanugo
C) medulla
D) Terminal
D) Terminal
What is the average growth rate of healthy hair on the scalp per month?
A) 1 1/4 inch
B) 1/2 inch
C) 1 inch
D) 1 1/2 inches
B) 1/2