Chapter 11 properties of hair and scalp

The study of the hair is technically called _____________

• trichology
• dermatology
• scientology
• hairolo

Full-grown human hair is divided into two principal parts, which are known as the hair root and the 

• hair shaft
• stem
• follicle
• furuncle

 The thickened, club-shaped structure that forms the lower part of the hair root is known as the _______________

• hair root
• hair shaft
• hair bulb
• dermal papilla

 The small involuntary muscle attached to the underside of the hair follicle is called the____________________

• arrector pili
• lungs
• blinking
• reflex

 Fear or cold causes the ________________ to contract, which makes the hair stand up straight, giving the appearance of goose bumps. 

• skin
• nerves
• arrector pili
• lanugo hair

 Oil glands, which consist of a sac-like structure in the dermis, are the _______________________

• sebaceous glands
• hair bulb
• pimple
• cuticle

 An oily substance secreted from the sebaceous glands that keeps the skin surface soft and supple is _______________.

• sebum
• serum
• pus
• grease

 The outermost layer of the hair is called the _______________

• cortex
• medulla
• cuticle
• protective cover

 The cuticle layer of the hair can be raised by ______________

• boiling
• processing
• cutting
• swelling

The ___________ is the middle layer of the hair that gives elasticity. 

• cuticle
• cortex
• medulla
• cheesy crust pizza