Understanding Hair and Nails Anatomy

What is the primary function of melanocytes in hair?

• To provide blood supply to the hair bulb

• To produce keratin

• To provide pigment for hair color

• To connect the hair follicle to the arrector pili muscle

Which part of the hair is most heavily keratinized?

• Medulla

• Cortex

• Cuticle

• Hair bulb

What is the structure that connects to the hair follicle and is responsible for pulling hairs upright when we are cold or frightened.?

• Melanocyte

• Arrector pili muscle

• Hair bulb

• Dermal papilla

Where does hair growth occur within the hair structure?

• In the cortex

• In the medulla

• In the matrix of the hair bulb in the stratum basale

• In the cuticle

Which part of the nail is responsible for its growth?

• Free edge

• Nail bed

• Cuticle

• Nail matrix

What is the role of the dermal region in a hair follicle?

• It provides a blood supply to the hair bulb

• It produces keratin for the hair shaft

• It contains melanocytes for hair color

• It forms the outer fibrous sheath

What is the composition of the hair follicle?

• Only an inner epithelial root sheath

• Only an outer fibrous sheath

• An inner epithelial root sheath and an outer fibrous sheath

• Only a dermal region

Which of the following is NOT a location where hair is found on the human body?

• Palms

• Scalp

• Arms

• Legs

Differentiate between the medulla and cortex of the hair.

• The medulla is the outermost layer, while the cortex is the innermost layer

• The medulla is the central core, while the cortex surrounds the medulla

• The medulla provides color, while the cortex provides strength

• The medulla is heavily keratinized, while the cortex is not

What makes nails appear colorless?

• Lack of keratin

• Lack of pigment

• Presence of melanin

• Presence of blood vessels