Assessment on Hair and Trichology

What are the basic building blocks of proteins that make up hair?

• Polypeptides

• Amino acids

• Eumelanin

• Keratin

What phase of hair growth is known as the active growth phase?

• Catagen phase

• Telogen phase

• Anagen phase

• Resting phase

Which elements make up human hair?

• Sodium, chlorine, sulfur, nitrogen, oxygen

• Carbon, oxygen, hydrogen, nitrogen, sulfur (COHNS elements)

• Calcium, phosphorus, sulfur, oxygen

• Hydrogen, helium, sulfur, nitrogen

The middle layer of the hair shaft responsible for its strength and elasticity is the:

• Hair cuticle

• Medulla

• Cortex

• Hair bulb

What is a natural growth pattern where hair grows in a circular direction?

• Hair stream

• Wave pattern

• Whorl

• Cowlick

Which type of melanin provides brown and black pigment to the hair?

• Eumelanin

• Pheomelanin

• Keratin

• Lanugo

What structure at the base of the hair follicle provides nourishment to the growing hair?

• Hair bulb

• Dermal papilla

• Medulla

• Cuticle

What is the strongest type of side bond in hair?

• Salt bond

• Hydrogen bond

• Disulfide bond

• Lanthionine bond

Hair’s ability to stretch and return to its original length without breaking is known as:

• Hair density

• Hair texture

• Hair elasticity

• Hair porosity

Fine, unpigmented hair found on infants is known as:

• Terminal hair

• Vellus hair

• Lanugo hair

• Anagen hair