Structure of hair
What is the scientific study of hair and its diseases?
Trichology
What is the lowest part of the hair strand?
Hair bulb
What is hair made of?
Keratin
What gives hair its natural color?
Melanin
What is the technical term for gray hair?
canities
What part of the hair is located above the skin surface?
Hair Shaft
What is the small, cone-shaped elevation that provides nutrients for hair growth?
Dermal Papilla
Name two elements that make up human hair.
Carbon, Oxygen, Hydrogen, Nitrogen, or Sulfur
Which type of melanin gives dark or black color?
Eumelanin
What is the medical term for abnormal hair loss?
Alopecia
What is the outermost layer of the hair called?
Cuticle
What muscle causes goosebumps when it contracts?
Arrector Pili Muscle
What joins amino acids together in the hair?
Peptide Bond
Which type of melanin gives red or yellow tones?
Pheomelanin
What type of alopecia causes bald spots?
Alopecia Areata
What layer gives hair its strength, elasticity, and color?
Cortex
What are oil glands connected to hair follicles called?
Sebaceous Glands
What weak bond in hair is broken by water?
Hydrogen Bond
Name the 3 phases of the hair growth cycle.
Anagen, Catagen, Telogen
What type of alopecia results in total scalp hair loss?
Alopecia Totalis
What is the innermost layer of thick, coarse hair called?
Medulla
What is the tube-like depression in the skin that contains the hair root?
Hair Follicle
What strong bond in hair is broken by chemicals?
Disulfide Bond
During which phase does hair grow?
Anagen Phase
What type of alopecia results in complete body hair loss?
Alopecia Universalis