Week 3 Terms & Study

Question 1

Trichology

Answer 1

The scientific study of hair and its diseases and care. Greek word trichos

Question 2

The Hair Root

Answer 2

Part of the hair located below the surface of the epidermis

Question 3

The Hair Shaft

Answer 3

Portion of hair that projects above the epidermis

Question 4

Hair Follicle

Answer 4

The tube-like depression or pocket in the skin or scalp that contains the hair root.

Question 5

Hair bulb

Answer 5

The lowest part of the hair strand

Question 6

Dermal Papilla

Answer 6

A small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb. “The mother of hair” because it contains the blood and nerve supply that provides the nutrients needed for hair growth

Question 7

Arrector Pili Muscle

Answer 7

The small involuntary muscle in the base of the hair follicle

Question 8

Sebaceous glands

Answer 8

The oil glands in the skin that are connected to the hair follicles the sebaceous glands secrete a fatty or oily substance called sebum, sebum lubricates the skin.

Question 9

The hair cuticle

Answer 9

Is the outer most layer of the hair

Question 10

The cortex

Answer 10

The middle layer of the hair. It is a fibrous proteins core formed by elongated cells containing melanin pigment

Question 11

The medulla

Answer 11

The inner most layer of the hair and is composed of round cells

Question 12

Amino Chains

Answer 12

Proteins are made of long chains of amino acids they are units that are joined together end to end like pop beads

Question 13

Side bonds

Answer 13

3 different types that link polypeptide chains together

Question 14

Hydrogen hydrogen bond

Answer 14

A weak physical cross-linked side bond that is easily broken by water or heat

Question 15

A salt bond

Answer 15

Also a weak physical cross-link side bond between adjacent polypeptide chains

Question 16

A disulfide bond

Answer 16

A strong chemical side bond that is very different from the physical side bond of a hydrogen bond or salt Pond that the sulfide bond joins the sofa or atoms of two neighboring cysteine one third of the hairs overall length

Question 17

Lanthionine Bonds

Answer 17

Hydroxide chemical hair relaxers break the sulfide bonds and then convert them to Lanthionene bonds

Question 18

Melanin

Answer 18

Tiny grains of pigment in the cortex that give natural color to the hair

Question 19

Eumelanin

Answer 19

Provides natural dark brown to black color to the hair and is the dark pigment predominant in black and brunette hair

Question 20

Pheomelanin

Answer 20

The lighter pigment that provides natural colors ranging from red and ginger to yellow and blonde tones

Question 21

Wave pattern

Answer 21

The wave pattern of hair refers to the shape of the hair strand it is described as straight wavy curly or extremely curly

Question 22

Vellus Hair

Answer 22

lanugo hair short, fine, unpigmented, and downy hair that appears on the body.

Question 23

Terminal hair

Answer 23

The long, course, pigmented hair found on the scalp, legs, arms, and the bodies of males and females.

Question 24

The Anagen Phase

Answer 24

growth phase

Question 25

The Catagen Phase

Answer 25

The brief transition. Between the growth and resting phases of a hair follicle

Question 26

The telogen phase

Answer 26

Also known as resting phase is the final phase in the hair cycle and last until the fully grown hair is shed.

Question 27

Hair loss

Answer 27

100-150 hairs per day

Question 28

Hair loss for Women

Answer 28

Abnormal hair loss is not as common in women as it is in men, but it can be very traumatic and devastating for women who experience it.

Question 29

Alopecia

Answer 29

Abnormal hair loss

Question 30

Alopecia areata

Answer 30

An auto immune disorder that causes the infected hair follicle’s to be mistakenly attacked by a persons old immune system affects 5 million people in the US

Question 31

Alopecia Totalis

Answer 31

This hair disorder usually begins with one or more small, round, smooth bald patches on the scalp and can progress to total scalp hair loss.

Question 32

Postpartum alopecia

Answer 32

Is temporary hair loss experienced at the end of pregnancy

Question 33

Trichoptilosis

Answer 33

Split ends

Question 34

Trichorrhexis Nodosa

Answer 34

Knotted hair

Question 35

Fragilitas

Answer 35

Brittle hair

Question 36

Pityriasis

Answer 36

Dandruff

Question 37

Malassezia

Answer 37

Naturally occurring fungus that is present on all human skin but causes the symptoms of dandruff when it grows out of control

Question 38

Course Hair

Answer 38

Has the largest diameter

Question 39

Hair texture

Answer 39

The thickness or a diameter of the individual hair strand

Question 40

Hair density

Answer 40

Measures the number of individual hair strands on one square inch

Question 41

Hair porosity

Answer 41

The ability of the hair to absorb moisture. The degree of hair porosity is directly related to the condition of the cuticle layer.

Question 42

Hair elasticity

Answer 42

Is the ability of the hair to stretch and return to its original length without breaking

Question 43

Hair stream

Answer 43

Hair flowing in the same direction

Question 44

Whorl

Answer 44

When hair leaves follicles at an angle on the head