Hair And Scalp

Question 1

Hair root and hair shaft?

Answer 1

The hair root is located below the epidermis , the hair shaft is the portion of the hair that projects about the epidermis

Question 2

Hair follicle, Hair bulb, Dermal Papilla, Arrector pili muscle, and sebaceous glands ?

Answer 2

1) Hair Follicle- Tube like depression or pocket in the skin or scalp that contains the hair root
2) Hair Bulb- Is the lowest part of a hair strand

3) Dermal Papilla- small cone shaped elevation located at the base and d the hair follicle that fits into the hair bulb.
Contains the blood and nerve supply that provides the nutrients

4) Arrector Pili Muscle- small involuntary muscle in the base of the hair follicle
5) Sebaceous glands- Oil glands in the skin that are connected to the hair follicles

Question 3

Cortex

Answer 3

Middle layer of the hair. About 90% of the total weight of the hair comes from the cortex.

Question 4

Medulla

Answer 4

Is the innermost layer of the hair.

Its common for people with fine hair to not have a medulla at all!

Question 5

Terminal hair

Answer 5

Long coarse pigmented hair found on the scalp, legs and arms

Question 6

Growth Cycles Of Hair ? (3)

Answer 6

Anagen Phase- growth phase, new hair is produced

Catagen Phase- brief transition period between the growth and resting phase

Telogen Phase- Resting phase, final phases and last until the hair is fully grown, and shedded

Question 7

Ringed hair

Answer 7

Variety of canities and pigmented hair

Question 8

Hypertrichosis

Answer 8

Condition of abnormal growth of hair

Question 9

Trichoptilosis

Answer 9

Technically term for spilt ends

Question 10

Trichorrhexis Nodosa

Answer 10

Tech term for knotted hair

Question 11

Monilethrix

Answer 11

Beaded hair

Question 12

Fragilitas Crinium

Answer 12

Brittle hair

Question 13

Hair follicle?

Answer 13

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

Question 14

Hair bulb?

Answer 14

The lowest part of a hair strand

Question 15

Dermal papilla

Answer 15

Small, cone shaped elevation located at the base of the hair follicle that fits into the hair bulb

Question 16

Hydrogen bond?

Answer 16

Is a weak physical side bond, cross link bond that is easily broken by heat or water

Question 17

Salt bonds?

Answer 17

Weak, physical, cross linked side bond. They are easily broken by strong alkaline or acidic solutions

Question 18

What are the three phases of hair growth?

Answer 18

Anagen phase, when new hair is produced

Catagen phase, brief transition period between the growth and resting phase of a hair follicle

Telogen phase, resting phase, is the final phase of hair growth and last until the fully grown hair is shed.