Milady Chapter 11 Quiz & Flashcards: Hair Properties

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Questions and Answers

The scientific study of hair, its diseases, and care is called:

Oncology

Pathology

Trichology (correct)

Dermatology

What are the two parts of a mature strand of human hair?

Hair shaft and hair root

What is the tube-like depression or pocket in the skin or scalp that contains the hair root?

Follicle

Hair follicles are not found on the:

Soles of the feet Signup and view all the answers

What is the tiny, involuntary muscle in the base of the hair follicle called?

Arrector pili Signup and view all the answers

What is the oily substance secreted from sebaceous glands?

Sebum Signup and view all the answers

For chemicals to penetrate a healthy cuticle hair layer, they must have what?

An alkaline pH Signup and view all the answers

The medulla is composed of what type of cells?

Round Signup and view all the answers

What is the process whereby living cells mature and begin their journey up the hair shaft?

Keratinization Signup and view all the answers

What are the five main elements that make up the chemical composition of human hair?

Carbon, oxygen, hydrogen, nitrogen, and sulfur Signup and view all the answers

What are the chemical bonds that hold together the amino acid molecules called?

Peptide bonds Signup and view all the answers

Which type of melanin provides natural colors ranging from red and ginger to yellow and blond tones?

Pheomelanin Signup and view all the answers

Asians tend to have what type of hair?

Extremely straight hair Signup and view all the answers

To help minimize tangles in extremely curly hair when washing, you should use what?

A detangling rinse Signup and view all the answers

How is hair texture classified?

Coarse, medium, or fine Signup and view all the answers

What is the measurement of individual hair strands on 1 square inch (2.5 square centimeters) of the scalp called?

Hair density Signup and view all the answers

Compared to hair with high porosity, chemical services performed on hair with low porosity require what?

More alkaline solutions Signup and view all the answers

Wet hair with normal elasticity can stretch up to what percentage of its original length?

50 percent Signup and view all the answers

How can oily scalp and hair be treated?

With normalizing shampoo Signup and view all the answers

Which type of hair almost never has a medulla?

Vellus Signup and view all the answers

What is the growth phase during which new hair is produced?

Anagen Signup and view all the answers

What is the average growth of healthy scalp hair?

1/2 inch (1.25 cm) per month Signup and view all the answers

What is the technical term used to describe gray hair?

Canities Signup and view all the answers

What is a condition of abnormal hair growth on areas of the body?

Hypertrichosis Signup and view all the answers

What is the medical term for dandruff?

Pityriasis Signup and view all the answers

How many amino acids that make up hair can the body produce?

11 of the 20 Signup and view all the answers

Salt bonds account for about what fraction of the hair's overall strength?

One-third Signup and view all the answers

The anagen phase generally lasts from three to how many years?

Five years Signup and view all the answers

Is scalp hair growth faster on women than on men?

Yes Signup and view all the answers

What phase signals the end of hair growth?

Catagen Signup and view all the answers

Does scalp massage affect hair growth?

No, it does not affect Signup and view all the answers

Compared to pigmented hair, is gray hair coarser or more resistant?

Neither coarser nor more resistant Signup and view all the answers

Could cross-sections of hair be almost any shape?

Yes Signup and view all the answers

How are bald men commonly perceived?

Less successful Signup and view all the answers

By age 35, almost what percentage of both men and women show some degree of hair loss?

40 percent Signup and view all the answers

What is finasteride intended for?

Men only Signup and view all the answers

When do congenital canities manifest?

At or before birth Signup and view all the answers

Dandruff can easily be mistaken for what?

Dry scalp Signup and view all the answers

What is believed to cause dandruff?

A fungus Signup and view all the answers

What is the most frequently encountered fungus infection resulting from hair services?

Tinea barbae Signup and view all the answers

What characterizes tinea?

Itching Signup and view all the answers

What is the infestation of the hair and scalp with head lice called?

Pediculosis Capitis Signup and view all the answers

Study Notes

Trichology and Hair Structure

Trichology is the scientific study concerning hair, its diseases, and care.
A mature human hair strand consists of two parts: the hair shaft and the hair root.
Hair follicles are tube-like structures in the skin that house the hair root; absent on the soles of the feet and palms.
The arrector pili is a small muscle at the base of each hair follicle, contributing to goosebumps.

Hair Composition and Growth

Sebum, produced by sebaceous glands, is an oily substance that lubricates hair.
Healthy hair cuticles allow chemical penetration when exposed to alkaline pH levels.
The medulla, the innermost layer of hair, is made up of round cells.
Keratinization is the process where living cells mature and ascend in the hair shaft.
Human hair primarily consists of carbon, oxygen, hydrogen, nitrogen, and sulfur.

Hair Properties and Characteristics

Peptide bonds link amino acids forming the proteins in hair.
Pheomelanin is the type of melanin responsible for red, ginger, yellow, and blond hair tones.
Asian hair tends to be extremely straight, influencing styling approaches.
Hair texture is classified into coarse, medium, or fine categories.

Density, Porosity, and Elasticity

Hair density measures the number of hair strands in one square inch of the scalp.
Chemically treated hair with low porosity requires stronger alkaline solutions compared to high porosity hair.
Wet hair with normal elasticity can stretch up to 50% of its original length.

Hair Care and Scalp Conditions

An oily scalp is best treated with normalizing shampoo.
Vellus hair is a type that almost never contains medulla.
The anagen phase is when new hair growth occurs, lasting typically three to five years.
The average rate of healthy scalp hair growth is approximately 1/2 inch (1.25 cm) per month.

Hair Loss and Conditions

"Canities" refers to graying hair, while "Hypertrichosis" is abnormal hair growth in unexpected areas.
Pityriasis is the medical term for dandruff, often caused by a fungus.
Dandruff may be confused with dry scalp conditions.
Tinea barbae is the most common fungal infection related to hair services, characterized by itching.
Pediculosis Capitis is the infestation of the scalp with head lice.

Sociocultural Perceptions

Baldness is often negatively perceived, associating bald men with decreased success.
By the age of 35, approximately 40% of both men and women experience some hair loss.
Finasteride, an oral medication for hair loss, is specifically prescribed for men.

Additional Insights

Scalp massage does not significantly influence hair growth rates.
Gray hair is not inherently coarser or more resistant than pigmented hair.
Hair cross-sections can take on various shapes, indicating diverse hair types.

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Description

Test your knowledge on the properties of hair and scalp with this practice quiz based on Milady's Chapter 11. Explore essential terms like trichology, hair structure, and the function of hair follicles. Perfect for those studying cosmetology or hair care.

Milady Chapter 11 - Properties of Hair and Scalp

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