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WorksheetsChapter 11: Properties of the Hair and Scalp (pt. 1)
Total questions: 26
Worksheet time: 17mins
(a) is the scientific study of hair and its diseases and care.
(a) means, "the study of".
A mature strand of human hair is divided into two parts:
(a)
Part of the hair strand located below the surface of the epidermis.
hair shaft
hair root
Part of the hair strand that projects above the dermis.
hair shaft
hair root
Small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb.
hair follicle
hair bulb
dermal papilla
arrector pili muscle
sebaceous gland
The tube-like depression or pocket in the skin or scalp that contains the hair root.
hair follicle
hair bulb
dermal papilla
arrector pili muscle
sebaceous glands
Small, involuntary muscle in the base of the hair follicle.
hair follicle
hair bulb
dermal papilla
arrector pili muscle
sebaceous glands
The oil glands in the skin that are connected to the hair follicles.
hair follicle
hair bulb
dermal papilla
arrector pili muscle
sebaceous glands
The thickened, club-shaped structure that forms the lower part of the root.
hair follicle
hair bulb
dermal papilla
arrector pili muscle
sebaceous glands
This muscle causes goose bumps when it contracts due to strong emotions or a cold sensation.
(a)
The sebaceous glands secrete a fatty or oily substance called (a) which lubricates the skin.
What are the three main layers of the hair shaft?
(a)
The outermost layer of the hair
cuticle
cortex
medulla
The middle layer of the hair
cuticle
cortex
medulla
The innermost layer of the hair
cuticle
cortex
medulla
In what layer of the hair do chemical changes take place?
cuticle
cortex
medulla
Hair is composed of ________________________ that grows from cells originating within the hair follicle.
protein, keratin
pigment, melanin
List the 5 main elements that are found in hair.
(a)
Which bond is a weak, physical, cross-link side bond that is easily broken by water or heat?
hydrogen bond
salt bond
disulfide bond
Weak, physical, cross-linked side bonds between adjacent polypeptide chains.
hydrogen bond
salt bond
disulfide bond
This bond is a strong, chemical side bond that joins the sulfur atoms of two neighboring cysteine amino acids to create one cystine.
hydrogen bond
salt bond
disulfide bond
These are tiny grains of color in the cortex that give natural color to the hair,
protein, keratin
pigment, melanin
Responsible for dark brown to black hair color
eumelanin
pheomelanin
Responsible for red and ginger to yellow and blond colors
eumelanin
pheomelanin
What are the 4 main wave patterns that shape the hair strand?
(a)
