Chapter 11 Properties Of The Hair And Scalp
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Are you looking to get information on hair or hairstyles? If yes, take this quiz chapter 11 properties of the hair and scalp test and answer the questions. The quiz has very informative facts, trivia, and practical knowledge questions regarding your hair. The quiz gives you scientific information on hair type and how to make your hair look better. If you like the quiz, share it with your friends and family. All the best!
Questions and Answers
- 1.
The scientific study of hair, its diseases, and care is called:
- A.
Dermatology
- B.
Trichology
- C.
Biology
- D.
Cosmetology
Correct Answer
B. TrichologyExplanation
Trichology is the correct answer because it specifically refers to the scientific study of hair, its diseases, and care. Dermatology is the study of skin, biology is the study of living organisms in general, and cosmetology is the study of beauty treatments and cosmetics. Therefore, trichology is the most appropriate term for the study of hair.Rate this question:
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- 2.
The two parts of a mature strand of human hair are the:
- A.
Dermis and epidermis
- B.
Hair shaft and hair follicle
- C.
Hair shaft and hair root
- D.
Hair root and hair follicle
Correct Answer
C. Hair shaft and hair rootExplanation
The correct answer is hair shaft and hair root. The hair shaft refers to the visible part of the hair that extends beyond the surface of the skin. It is composed of dead cells that have been pushed up from the hair follicle. The hair root, on the other hand, is the part of the hair that is located below the surface of the skin. It is embedded in the hair follicle and is responsible for producing new hair cells.Rate this question:
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- 3.
The tube-like depression or pocket in the skin or scalp that contains the hair root is the:
- A.
Follicle
- B.
Shaft
- C.
Bulb
- D.
Scalp
Correct Answer
A. FollicleExplanation
The correct answer is follicle. The follicle is a tube-like depression or pocket in the skin or scalp that contains the hair root. It provides nourishment to the hair and is responsible for hair growth. The shaft refers to the visible part of the hair above the skin surface. The bulb is the rounded base of the hair follicle where the hair root is formed. The scalp is the skin on the top of the head.Rate this question:
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- 4.
Hair follicles are not found on the:
- A.
Forehead area
- B.
Back of the hands
- C.
Soles of the feet
- D.
Back of the neck
Correct Answer
C. Soles of the feetExplanation
Hair follicles are not found on the soles of the feet because the skin on the soles is thick and does not have hair follicles. Hair follicles are responsible for producing and growing hair, but the skin on the soles of the feet is adapted for bearing weight and walking, so it does not have hair follicles.Rate this question:
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- 5.
The ________________ is a tiny, involuntary muscle in the base of the hair follicle.
- A.
Medulla
- B.
Arrector pili
- C.
Tinea
- D.
Dermal papilla
Correct Answer
B. Arrector piliExplanation
The arrector pili is a tiny, involuntary muscle located at the base of the hair follicle. This muscle is responsible for causing the hair to stand up straight, resulting in the phenomenon commonly known as "goosebumps." When the arrector pili muscle contracts, it pulls on the hair follicle, causing the hair to become more erect. This response is often triggered by cold temperatures or strong emotions, such as fear or excitement.Rate this question:
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- 6.
A oily substance secreted from the sebaceous glands is:
- A.
Sweat
- B.
Lymph
- C.
Catagen
- D.
Sebum
Correct Answer
D. SebumExplanation
Sebum is the oily substance secreted from the sebaceous glands. These glands are found in the skin and their main function is to produce sebum, which helps to lubricate and waterproof the skin and hair. Sebum also helps to protect the skin from drying out and provides a natural barrier against bacteria and other pathogens. Sweat, lymph, and catagen are not substances secreted from the sebaceous glands, making sebum the correct answer.Rate this question:
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- 7.
For chemicals tp penetrate a healthy cuticle hair layer, they must have:
- A.
No pH
- B.
A neutral pH
- C.
An alkaline pH
- D.
An acidic pH
Correct Answer
C. An alkaline pHExplanation
Chemicals need to have an alkaline pH in order to penetrate a healthy cuticle hair layer. The cuticle is the outermost layer of the hair and is made up of overlapping scales. These scales lay flat when the hair has a neutral pH, but when the pH becomes alkaline, the scales lift, allowing chemicals to enter the hair shaft. This is why alkaline solutions, such as hair relaxers or color treatments, are used to penetrate and alter the structure of the hair.Rate this question:
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- 8.
The medulla is composed of ________________ cells.
- A.
Rod-shaped
- B.
Round
- C.
Spiral-shaped
- D.
Rectangular
Correct Answer
B. RoundExplanation
The medulla is composed of round cells.Rate this question:
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- 9.
The process whereby living cells mature and begin their journey up the hair shaft is:
- A.
Anagen
- B.
Catagen
- C.
Keratinization
- D.
Osmosis
Correct Answer
C. KeratinizationExplanation
Keratinization is the correct answer because it refers to the process by which living cells in the hair follicles mature and transform into non-living cells filled with keratin, a protein that gives hair its strength and structure. During keratinization, these cells move up the hair shaft, gradually hardening and becoming keratinized. This process is essential for the growth and development of hair. Anagen, catagen, and osmosis are not directly related to the maturation and journey of cells up the hair shaft.Rate this question:
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- 10.
The five main elements that make up the chemical composition of human hair are carbon, oxygen, hydrogen, and :
- A.
Lead and zinic
- B.
Keratin and selenium
- C.
Born and calcium
- D.
Nitrogen and sulfur
Correct Answer
D. Nitrogen and sulfurExplanation
Human hair is primarily made up of a protein called keratin, which contains the elements carbon, oxygen, hydrogen, nitrogen, and sulfur. Therefore, the correct answer is nitrogen and sulfur.Rate this question:
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- 11.
The chemical bonds that hold together the amino acid molecules are called:
- A.
Convex bonds
- B.
Peptide bonds
- C.
Helium bonds
- D.
Protein bonds
Correct Answer
B. Peptide bondsExplanation
Peptide bonds are the correct answer because they are the chemical bonds that link amino acids together in a protein chain. These bonds form through a condensation reaction, where the carboxyl group of one amino acid reacts with the amino group of another, resulting in the formation of a peptide bond and the release of a water molecule. Peptide bonds are crucial for the structure and function of proteins, as they determine the specific sequence and shape of the protein chain.Rate this question:
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- 12.
Which type of melanin provides natural colors ranging from red and ginger to yellow and blond tones?
- A.
Pheomelanin
- B.
Eumelanin
- C.
Polymelanin
- D.
Biomelanin
Correct Answer
A. PheomelaninExplanation
Pheomelanin is the type of melanin that provides natural colors ranging from red and ginger to yellow and blond tones. Eumelanin is responsible for darker hair colors, while polymelanin and biomelanin are not involved in determining hair color.Rate this question:
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- 13.
Asians tend to have:
- A.
Extremely straight hair
- B.
Extremely curly hair
- C.
Straight to wavy hair
- D.
Wavy to curly hair
Correct Answer
A. Extremely straight hairExplanation
Asians tend to have extremely straight hair. This is a common characteristic among many Asians, as their hair typically lacks natural curl or wave. This straight hair texture is often attributed to genetic factors and is a distinguishing feature of Asian hair types.Rate this question:
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- 14.
To help minimize tangles in extremely curly hair when washing, you should use:
- A.
A drying shampoo
- B.
Strong scalp manipulations
- C.
A detangling rinse
- D.
Soap instead of shampoo
Correct Answer
C. A detangling rinseExplanation
To help minimize tangles in extremely curly hair when washing, using a detangling rinse is the best option. Detangling rinses are specifically formulated to soften and smooth the hair, making it easier to comb through and reducing the risk of tangles. Drying shampoos may strip the hair of its natural oils, leading to further tangling, while strong scalp manipulations can cause breakage and damage to the hair. Using soap instead of shampoo may not provide the necessary conditioning properties to prevent tangles.Rate this question:
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- 15.
Hair texture is classified as:
- A.
Wavy, straight, or curly
- B.
Coarse, medium, or fine
- C.
Light, medium, or dark
- D.
Long, medium, or short
Correct Answer
B. Coarse, medium, or fineExplanation
Hair texture is classified as coarse, medium, or fine based on the diameter of the individual hair strands. Coarse hair has a larger diameter and feels thicker and more robust, while fine hair has a smaller diameter and feels thinner and more delicate. Medium hair falls in between coarse and fine hair in terms of thickness. This classification helps in determining the appropriate hair care products and styling techniques for different hair types.Rate this question:
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- 16.
The measurement of individual hair strands on 1 square inch (2.5 square centimeters) of the scalp is:
- A.
Hair density
- B.
Hair elasticity
- C.
Hair texture
- D.
Hair porosity
Correct Answer
A. Hair densityExplanation
Hair density refers to the number of individual hair strands on a given area of the scalp. It is measured by counting the number of hairs in a specific square inch or centimeter of the scalp. This measurement helps determine how thick or thin a person's hair is.Rate this question:
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- 17.
Compared to hair with high porosity, chemical services performed on hair with low porosity require:
- A.
Neutral solutions
- B.
More acidic solutions
- C.
Solutions of the pH
- D.
More alkaline solutions
Correct Answer
D. More alkaline solutionsExplanation
Hair with low porosity has tightly closed cuticles, making it difficult for chemicals to penetrate the hair shaft. To effectively perform chemical services on such hair, more alkaline solutions are required. Alkaline solutions help to raise the hair's pH level and open up the cuticles, allowing the chemicals to penetrate and work effectively. Acidic solutions would not be as effective in this case as they would further close the cuticles, preventing the chemicals from entering the hair shaft.Rate this question:
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- 18.
Wet hair with normal elasticity will stretch up to ______________ of its original length.
- A.
25 perecent
- B.
40 percent
- C.
50 percent
- D.
70 percent
Correct Answer
C. 50 percentExplanation
Wet hair with normal elasticity will stretch up to 50 percent of its original length. This means that when wet, the hair can be stretched to half of its original length without breaking or losing its shape. This is an important characteristic of healthy hair, as it indicates that it can withstand some tension and manipulation without being damaged.Rate this question:
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- 19.
Oily scalp and hair can be treated by properly washing it:
- A.
Without shampoo
- B.
With normalizing shampoo
- C.
With conditioning shampoo
- D.
With dry shampoo
Correct Answer
B. With normalizing shampooExplanation
Normalizing shampoo is specifically designed to treat oily scalp and hair. It helps to balance the scalp's natural oil production and remove excess oil and buildup. By using a normalizing shampoo, it can effectively cleanse the scalp and hair, leaving them feeling clean and refreshed.Rate this question:
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- 20.
Which type of hair almost never has a medulla?
- A.
Oily
- B.
Pigmented
- C.
Dark
- D.
Vellus
Correct Answer
D. VellusExplanation
Vellus hair is a type of hair that is very fine and short, commonly found on the body of children and women. It is often referred to as "peach fuzz" and does not have a medulla, which is the innermost layer of the hair shaft. The absence of a medulla in vellus hair is due to its thin and delicate nature. This distinguishes vellus hair from other types of hair, such as oily, pigmented, and dark hair, which typically have a medulla.Rate this question:
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- 21.
The growth phase during which new hair is produced is:
- A.
Patagen
- B.
Telogen
- C.
Anagen
- D.
Catagen
Correct Answer
C. AnagenExplanation
During the anagen phase, new hair is produced. This is the active growth phase of the hair follicle, where cells divide rapidly and hair grows at a rate of about half an inch per month. This phase can last for several years, and it is during this phase that the hair shaft is formed and pushed up through the scalp.Rate this question:
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- 22.
The average growth of healthy scalp hair is:
- A.
1/2 inch (1.25 cm) per week
- B.
1 inch (2.5 cm) per week
- C.
1/2 inch (1.25 cm)per month
- D.
1 inch (2.5 cm) per month
Correct Answer
C. 1/2 inch (1.25 cm)per month -
- 23.
The technical term used to describe gray hair is:
- A.
Canities
- B.
Tinea
- C.
Alopecia
- D.
Albino
Correct Answer
A. CanitiesExplanation
Canities is the correct technical term used to describe gray hair. It refers to the natural graying of hair due to the loss of pigment melanin. This term is commonly used in medical and scientific contexts to describe the phenomenon of hair turning gray or white with age. Tinea refers to a fungal infection of the skin, alopecia refers to hair loss, and albino describes a person or animal with a congenital absence of pigment, resulting in white hair, skin, and eyes.Rate this question:
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- 24.
A condition of abnormal hair growth on areas of the body is:
- A.
Trichorrhexis
- B.
Ringed hair
- C.
Hypertrichosis
- D.
Electrolysis
Correct Answer
C. HypertrichosisExplanation
Hypertrichosis is the correct answer because it refers to a condition of abnormal hair growth on areas of the body. This condition causes excessive hair growth beyond what is considered normal for a person's age, sex, and ethnic background. Hypertrichosis can occur in specific areas or can be generalized, affecting the entire body. It can be caused by various factors, including genetics, hormonal imbalances, medications, and certain medical conditions.Rate this question:
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- 25.
The medical term for dandruff is:
- A.
Canities
- B.
Pityriasis
- C.
Alopecia
- D.
Simplex
Correct Answer
B. PityriasisExplanation
The correct answer for the medical term for dandruff is "pityriasis." Pityriasis is a common skin condition characterized by the excessive shedding of dead skin cells from the scalp, resulting in white or gray flakes. It is often accompanied by itching and can be caused by various factors such as dry skin, fungal infections, or certain skin conditions. Canities refers to the graying of hair, alopecia is the medical term for hair loss, and simplex refers to a condition that is uncomplicated or not involving other factors.Rate this question:
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- 26.
The body can produce 11 of the 20 _____________ that make up hair.
- A.
Amino acids
- B.
COHNS elements
- C.
Disulfide bonds
- D.
Polypeptide chains
Correct Answer
A. Amino acidsExplanation
The body is capable of producing 11 out of the 20 amino acids that make up hair. Amino acids are the building blocks of proteins, and hair is primarily composed of a protein called keratin. The body can synthesize these amino acids through various metabolic pathways, while the remaining 9 essential amino acids must be obtained through diet. Therefore, the correct answer is amino acids.Rate this question:
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- 27.
Salt bonds account for about _______________ of the hair's overall strength.
- A.
One-quarter
- B.
One-half
- C.
One-third
- D.
Two-thirds
Correct Answer
C. One-thirdExplanation
Salt bonds account for about one-third of the hair's overall strength. These bonds are formed between the positive and negative charges of amino acids in the hair protein structure. They contribute to the hair's strength and stability, but they are not as strong as other types of bonds like disulfide bonds. Therefore, one-third is the correct answer as it indicates the approximate proportion of the hair's overall strength that can be attributed to salt bonds.Rate this question:
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- 28.
The anagen phase generally lasts from three to five:
- A.
Days
- B.
Weeks
- C.
Months
- D.
Years
Correct Answer
D. YearsExplanation
The anagen phase refers to the active growth phase of hair follicles. During this phase, the hair cells divide rapidly, resulting in the growth of new hair. The anagen phase can vary in duration depending on various factors, such as genetics and overall health. While it typically lasts for a few years, it can range from three to five years in most individuals.Rate this question:
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- 29.
Scalp hair grows ______________ on women than on men.
- A.
Slower
- B.
Faster
- C.
Thinner
- D.
Thicker
Correct Answer
B. FasterExplanation
Women generally have faster hair growth compared to men. This is due to hormonal differences between the sexes. Women tend to have higher levels of estrogen, which promotes hair growth, while men have higher levels of testosterone, which can slow down hair growth. Additionally, women's hair follicles may be more active and have a shorter resting phase, leading to faster growth. Therefore, the correct answer is "faster".Rate this question:
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- 30.
The _____________ phase signals the end of the growth phase.
- A.
Cysteine
- B.
Cystine
- C.
Anlagen
- D.
Catagen
Correct Answer
D. CatagenExplanation
The catagen phase signals the end of the growth phase. During this phase, the hair follicle stops producing new cells and the hair stops growing. It is a transitional phase between the active growth phase (anagen) and the resting phase (telogen).Rate this question:
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- 31.
Scalp message __________________ hair growth.
- A.
Increases
- B.
Decreases
- C.
Does not affect
- D.
Is necessary for
Correct Answer
C. Does not affectExplanation
A scalp massage does not affect hair growth. While a scalp massage can improve blood circulation and promote relaxation, it does not directly impact the growth of hair follicles. Hair growth is primarily determined by factors such as genetics, hormones, and overall health. Therefore, a scalp massage may feel good and have other benefits, but it does not have a direct effect on hair growth.Rate this question:
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- 32.
Compared to pigmented hair, gray hair is:
- A.
Neither coarser nor more resistant
- B.
Both coarser and more resistant
- C.
coarser
- D.
More resistant
Correct Answer
A. Neither coarser nor more resistantExplanation
Gray hair is not coarser than pigmented hair because the texture of hair is determined by the size and shape of the hair follicle, not by the presence or absence of pigment. Similarly, gray hair is not more resistant than pigmented hair because resistance to damage or breakage is also not influenced by the presence or absence of pigment. Therefore, gray hair is neither coarser nor more resistant than pigmented hair.Rate this question:
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- 33.
Cross-sections of hair:
- A.
Are always round
- B.
Are always oval
- C.
Are always flattened
- D.
Can be almost any shape
Correct Answer
D. Can be almost any shapeExplanation
Cross-sections of hair can be almost any shape because hair can vary in texture and thickness from person to person. The shape of the cross-section is determined by the shape of the hair follicle, which can be round, oval, or flattened. This variation in shape is what gives individuals their unique hair types, such as straight, wavy, or curly. Therefore, it is incorrect to say that cross-sections of hair are always round, oval, or flattened, as they can be almost any shape.Rate this question:
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- 34.
Bald men are commonly perceived as:
- A.
More assertive
- B.
Younger
- C.
More physically attractive
- D.
Less successful
Correct Answer
D. Less successfulExplanation
Bald men are commonly perceived as less successful. This perception may stem from societal stereotypes and biases that associate baldness with aging and a decline in physical attractiveness. These stereotypes can lead to assumptions that bald men are less successful in their careers or personal lives, despite there being no actual correlation between baldness and success. It is important to recognize and challenge these stereotypes to prevent unfair judgments based on appearance.Rate this question:
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- 35.
By age 35, almost ________________ percent of both men and women show some degree of hair lost.
- A.
20
- B.
30
- C.
40
- D.
50
Correct Answer
C. 40Explanation
By age 35, almost 40 percent of both men and women show some degree of hair loss. This suggests that hair loss is a common occurrence and affects a significant portion of the population by this age. It is important to note that hair loss can be caused by various factors such as genetics, hormonal changes, and certain medical conditions.Rate this question:
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- 36.
Finasteride ia an oral prescription medication for hair loss that meant for:
- A.
Men only
- B.
Women only
- C.
Men and women
- D.
Animals
Correct Answer
A. Men onlyExplanation
Finasteride is an oral prescription medication specifically designed for men. It is used to treat male pattern baldness, a condition that affects men and causes hair loss. The medication works by inhibiting the conversion of testosterone to dihydrotestosterone (DHT), which is the hormone responsible for hair loss in men. Since women do not typically experience male pattern baldness, finasteride is not recommended for them. Therefore, the correct answer is "men only".Rate this question:
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- 37.
Congenital canities manifests:
- A.
At or before birth
- B.
During adolescence
- C.
During middle age
- D.
In the later years of life
Correct Answer
A. At or before birthExplanation
Congenital canities refers to the premature graying of hair that occurs at or before birth. This condition is rare and occurs due to a lack of pigment-producing cells in the hair follicles. Unlike regular graying of hair that happens with age, congenital canities is present from birth or develops during infancy. The premature graying is usually uniform and affects all the hair on the body.Rate this question:
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- 38.
Dandruff can easily be mistaken for:
- A.
Tinea
- B.
Dry scalp
- C.
Pediculosis capris
- D.
Trichoptilosis
Correct Answer
B. Dry scalpExplanation
Dandruff can easily be mistaken for dry scalp because both conditions result in flakes of dead skin on the scalp. However, there are some differences between the two. Dandruff is usually accompanied by itching and can be caused by an overgrowth of a yeast-like fungus on the scalp. On the other hand, dry scalp is caused by a lack of moisture and oil on the scalp, leading to dryness and flaking. While both conditions may appear similar, the underlying causes and treatments differ.Rate this question:
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- 39.
Dandruff is believed to be caused by a:
- A.
Bacterium
- B.
Virus
- C.
Parasite
- D.
Fungus
Correct Answer
D. FungusExplanation
Dandruff is caused by a fungus. Fungal infections on the scalp can lead to the shedding of dead skin cells, which appear as dandruff. This fungus, known as Malassezia, is naturally present on the scalp but can multiply excessively, leading to dandruff. It feeds on the natural oils produced by the scalp, causing irritation and flaking. Antifungal treatments, such as medicated shampoos, are often used to control dandruff by reducing the overgrowth of this fungus.Rate this question:
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- 40.
The most frequently encountered fungal infection resulting from hair services is:
- A.
Tinea barbae
- B.
Tinea capitis
- C.
Tinea pedis
- D.
Tinea favosa
Correct Answer
A. Tinea barbaeExplanation
Tinea barbae is the most frequently encountered fungal infection resulting from hair services. This infection affects the hair follicles and the surrounding skin of the beard and mustache area. It is commonly caused by the fungus Trichophyton rubrum and can be transmitted through direct contact with an infected person or contaminated objects. Symptoms include redness, itching, and pustules or nodules in the affected area. Prompt treatment with antifungal medications is necessary to clear the infection and prevent its spread.Rate this question:
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- 41.
Tinea is characterized by:
- A.
Numbness
- B.
Blisters
- C.
Sudden hair loss
- D.
Itching
Correct Answer
D. ItchingExplanation
Tinea is a fungal infection of the skin, commonly known as ringworm. It is characterized by itching, redness, and a circular rash. Numbness and blisters are not typical symptoms of tinea. Sudden hair loss may occur if the infection affects the scalp, but it is not a defining characteristic. Therefore, the correct answer is itching, as it is a common symptom experienced by individuals with tinea.Rate this question:
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- 42.
The infestation of hair and scalp with head lice is called:
- A.
Hyperttichosis
- B.
Trichoptilosis
- C.
Pediculosis capitis
- D.
Fragilitas cranium
Correct Answer
C. Pediculosis capitisExplanation
The correct answer is pediculosis capitis. Pediculosis capitis refers to the infestation of hair and scalp with head lice. Hyperttichosis is a condition characterized by excessive hair growth. Trichoptilosis is the splitting or fraying of hair ends. Fragilitas cranium is not a recognized term related to head lice infestation.Rate this question:
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- 43.
A carbuncle is similar to a furuncle, but is:
- A.
Smaller
- B.
Larger
- C.
Much darker in color
- D.
Much lighter in color
Correct Answer
B. LargerExplanation
A carbuncle is a type of skin infection that is larger in size compared to a furuncle. It is characterized by a cluster of boils that are connected under the skin. The infection is usually deeper and more severe, causing more pain and discomfort. Unlike a furuncle, which is a single boil, a carbuncle can be several centimeters in diameter and may require medical intervention such as drainage or antibiotics for treatment.Rate this question:
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- 44.
Fine hair is _____________ than coarse or medium hair.
- A.
Thicker
- B.
Harder tp process
- C.
Less susceptible to damage from chemical services
- D.
More fragile
Correct Answer
D. More fragileExplanation
Fine hair is more fragile than coarse or medium hair. This means that it is more prone to breakage and damage. Fine hair strands are thinner and have less density, making them more delicate and easier to break. They require gentle handling and special care to prevent damage from styling, heat, and chemical treatments.Rate this question:
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- 45.
Coarse hair:
- A.
Has the smallest diameter of the three types of hair texture
- B.
Is the most common hair texture
- C.
Is not resistant to chemical services
- D.
Is stronger than fine hair
Correct Answer
D. Is stronger than fine hairExplanation
Coarse hair is stronger than fine hair because it has a larger diameter and more protein content. The larger diameter of coarse hair provides more structural support, making it less prone to breakage. Additionally, coarse hair typically has a higher density of cuticle layers, which adds to its strength. Fine hair, on the other hand, has a smaller diameter and fewer cuticle layers, making it more fragile and susceptible to damage. Therefore, coarse hair is stronger than fine hair.Rate this question:
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- 46.
The ______________ is the outermost layer of hair.
- A.
Hair cuticle
- B.
Hair bulb
- C.
Hair follicle
- D.
Hair root
Correct Answer
A. Hair cuticleExplanation
The hair cuticle is the outermost layer of hair. It acts as a protective covering for the inner layers of the hair shaft. It consists of overlapping scales that help to protect the hair from damage and keep it hydrated. The cuticle also plays a role in determining the texture and appearance of the hair.Rate this question:
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- 47.
The oil glands in the skin that are connected to the hair follicles are the _______________ glands.
- A.
Systine
- B.
Simplex
- C.
Sebaceous
- D.
Scutulua
Correct Answer
C. SebaceousExplanation
The correct answer is sebaceous. The oil glands in the skin that are connected to the hair follicles are called sebaceous glands. These glands produce sebum, an oily substance that helps to moisturize and protect the skin and hair.Rate this question:
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- 48.
A _______________ bond is a physical bond easily broken by water or heat.
- A.
Hydrogen
- B.
Hydrophilic
- C.
Hydrophobic
- D.
Helix
Correct Answer
A. HydrogenExplanation
A hydrogen bond is a physical bond easily broken by water or heat. Hydrogen bonds occur when a hydrogen atom is attracted to an electronegative atom, such as oxygen or nitrogen. These bonds are relatively weak and can be disrupted by the presence of water or by an increase in temperature.Rate this question:
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- 49.
Hair is approximately __________________ percent protein.
- A.
60
- B.
70
- C.
80
- D.
90
Correct Answer
D. 90Explanation
Hair is made up of a protein called keratin, which accounts for its strength and structure. Therefore, it can be concluded that hair is approximately 90 percent protein.Rate this question:
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- 50.
Total scalp hair loss is now as:
- A.
Alopecia areata
- B.
Androgenetic alopecia
- C.
Alopecia totalis
- D.
Alopecia universalis
Correct Answer
C. Alopecia totalisExplanation
Alopecia totalis refers to the complete loss of hair on the scalp. This condition is characterized by the absence of any hair follicles and can result in a completely bald scalp. It is a more severe form of alopecia areata, which is a condition where hair loss occurs in patches. Androgenetic alopecia, on the other hand, is a common form of hair loss that is typically caused by genetic factors and hormonal imbalances. Alopecia universalis is a rare condition where there is complete loss of hair on the entire body, including the scalp.Rate this question:
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Jul 26, 2023Quiz Edited by
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Jan 16, 2017Quiz Created by
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