Hair And Scalp Properties Quiz! Trivia
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Do you know anything about hair and scalp properties? Cosmetologists should study hair and scalp properties because they must learn specifically about their client’s hair and what is best for it. Chemical services should be available to clients and help them to take care of their hair. There are also a plethora of ways to cut and style hair. Take this quiz on hair and scalp properties and see if you make the cut.
Questions and Answers
- 1.
The medulla is composed of ________ cells
- A.
Elongated
- B.
Round
- C.
Scale-like
- D.
Pigmented
Correct Answer
B. RoundExplanation
The medulla is composed of round cells. This means that the cells in the medulla have a circular shape. The round shape of the cells in the medulla may have specific functions or characteristics that are important for its role in the body. However, without further context or information, it is difficult to provide a more detailed explanation.Rate this question:
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- 2.
Hair follicles are distributed all over the body, with the exception of the?
- A.
Face and palms of hands
- B.
Palms of hands and elbows
- C.
Palms of hands and soles of feet
- D.
Soles of feet and forearms
Correct Answer
C. Palms of hands and soles of feetExplanation
Hair follicles are distributed all over the body, except for the palms of hands and soles of feet. This is because the skin on the palms and soles is thick and specialized for gripping and walking, respectively. The absence of hair follicles in these areas allows for better tactile sensitivity and grip.Rate this question:
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- 3.
Hair is approximately 90 percent?
- A.
Protein
- B.
Carbohydrates
- C.
Fat
- D.
Melanin
Correct Answer
A. ProteinExplanation
Hair is made up of a protein called keratin, which is responsible for its strength and structure. Keratin makes up approximately 90 percent of the composition of hair. It provides hair with its elasticity and helps to prevent breakage. Protein is essential for the growth and maintenance of hair, and a lack of protein in the diet can lead to weak and brittle hair. Therefore, it is correct to say that hair is approximately 90 percent protein.Rate this question:
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- 4.
The scientific study of hair & its diseases & care is called?
- A.
Physiology
- B.
Trichology
- C.
Cosmetology
- D.
Dermatology
Correct Answer
B. TrichologyExplanation
Trichology is the correct answer because it specifically refers to the scientific study of hair and its diseases and care. Physiology is the study of how living organisms function, which is too broad to be the correct answer. Cosmetology is the study of beauty treatments, including hair, but it does not focus solely on the scientific aspect of hair. Dermatology is the branch of medicine that deals with the skin, hair, and nails, but it does not solely focus on hair. Therefore, Trichology is the most appropriate term for the scientific study of hair and its related aspects.Rate this question:
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- 5.
The term used to describe abnormal hair loss is?
- A.
Scutula
- B.
Monilethrix
- C.
Alopecia
- D.
Trichoptilosis
Correct Answer
C. AlopeciaExplanation
Alopecia is the correct answer because it is the term used to describe abnormal hair loss. Alopecia can refer to hair loss on the scalp or any other part of the body. It can be caused by various factors such as genetics, hormonal changes, autoimmune diseases, and certain medications. The term "Scutula" refers to a crust or scab on the skin, "Monilethrix" is a rare genetic condition that causes hair to become brittle and break easily, and "Trichoptilosis" is the medical term for split ends.Rate this question:
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- 6.
The maturing process of hair is?
- A.
Malasezia
- B.
Pityriasis
- C.
Keratinization
- D.
Trichoptilosis
Correct Answer
C. KeratinizationExplanation
Keratinization is the correct answer because it refers to the process by which hair cells undergo maturation and become hard and durable. During keratinization, the hair cells produce the protein keratin, which gives hair its strength and structure. This process occurs as new hair cells are formed at the base of the hair follicle and push older cells upward, causing them to become keratinized and form the shaft of the hair.Rate this question:
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- 7.
The _______ glands secrete sebum?
- A.
Sudoriferous
- B.
Parotid
- C.
Sebaceous
- D.
Duodenal
Correct Answer
C. SebaceousExplanation
Sebaceous glands secrete sebum, an oily substance that lubricates and waterproofs the skin and hair. These glands are found all over the body, except for the palms of the hands and soles of the feet. Sebum helps to keep the skin moisturized and protects it from drying out. It also helps to prevent the hair from becoming brittle and keeps it shiny. The sebaceous glands can become overactive, leading to oily skin and acne, or underactive, resulting in dry skin.Rate this question:
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- 8.
The small, cone-shaped area at the base of the hair follicle that fits into the hair bulb is the?
- A.
Hair bulb
- B.
Dermal papilla
- C.
Sebaceous gland
- D.
Arrector pili
Correct Answer
B. Dermal papillaExplanation
The dermal papilla is the small, cone-shaped area at the base of the hair follicle that fits into the hair bulb. It is responsible for supplying blood and nutrients to the hair follicle, which promotes hair growth. The dermal papilla also plays a role in controlling the thickness and color of the hair.Rate this question:
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- 9.
An acute, localized bacterial infection of a hair follicle that produces constant pain, is called a boil or a?
- A.
Scutula
- B.
Pityriasis Steatoides
- C.
Carbuncle
- D.
Furuncle
Correct Answer
D. FuruncleExplanation
A furuncle is an acute, localized bacterial infection of a hair follicle that causes constant pain. It is commonly known as a boil. This infection is typically caused by the bacteria Staphylococcus aureus. The infection starts as a small, red, tender bump and gradually develops into a larger, painful, pus-filled swelling. Treatment usually involves applying warm compresses to the affected area, keeping it clean, and in some cases, antibiotics may be prescribed.Rate this question:
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- 10.
Unique protein structures within the cortex are responsible for the color and ______ of hair?
- A.
Texture
- B.
Length
- C.
Elasticity
- D.
Shine
Correct Answer
C. ElasticityExplanation
The unique protein structures within the cortex of hair are responsible for its elasticity. These protein structures, such as keratin, provide the hair with its ability to stretch and return to its original shape. Elasticity is an important characteristic of hair as it allows for flexibility and resistance to breakage.Rate this question:
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- 11.
The portion of the hair that projects above the skin are the?
- A.
Hair bulb
- B.
Hair shaft
- C.
Hair follicle
- D.
Hair root
Correct Answer
B. Hair shaftExplanation
The hair shaft refers to the portion of the hair that is visible above the skin. It is the part of the hair that we can see and touch. The hair shaft is made up of dead cells that have been pushed up through the hair follicle. It is composed of a protein called keratin, which gives hair its strength and elasticity. The hair shaft is responsible for protecting the hair follicle and providing insulation to the body.Rate this question:
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- 12.
These neutralizers are used to reform ______ bonds.
- A.
Disulfide
- B.
Salt
- C.
Hydrogen
- D.
Peptide
Correct Answer
A. DisulfideExplanation
Disulfide bonds are a type of covalent bond that form between two sulfur atoms in proteins. These bonds play a crucial role in stabilizing the structure of proteins. Neutralizers are substances that can break or reform these disulfide bonds. Therefore, the correct answer is "Disulfide" as the neutralizers mentioned in the question are used to reform disulfide bonds.Rate this question:
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- 13.
The cortex of the hair has a fibrous protein core formed by _____ cells.
- A.
Elongated
- B.
Round
- C.
Transparent
- D.
Scale-like
Correct Answer
A. ElongatedExplanation
The correct answer is "Elongated" because the cortex of the hair is composed of elongated cells. These cells contain a fibrous protein core, which gives the hair its strength and structure. The elongated shape of these cells allows them to align parallel to the hair shaft, providing support and stability to the hair.Rate this question:
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- 14.
The technical term for brittle hair is?
- A.
Hypertrichosis
- B.
Monilethrix
- C.
Fragilitas crinium
- D.
Trichoptilosis
Correct Answer
C. Fragilitas criniumExplanation
Fragilitas crinium is the correct answer because it is the technical term used to describe brittle hair. Fragilitas crinium refers to a condition where the hair becomes weak, fragile, and prone to breakage. This condition can be caused by various factors such as excessive heat styling, chemical treatments, nutritional deficiencies, and certain medical conditions.Rate this question:
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- 15.
Polypeptide chains are cross-linked like the rungs on a ladder by ________ different types of side bonds?
- A.
Five
- B.
Six
- C.
Two
- D.
Three
Correct Answer
D. ThreeExplanation
Polypeptide chains are cross-linked by three different types of side bonds. These bonds include disulfide bonds, hydrogen bonds, and hydrophobic interactions. Disulfide bonds form between two cysteine amino acids and contribute to the stability of the protein structure. Hydrogen bonds form between the amino and carboxyl groups of different amino acids, helping to maintain the secondary structure of the protein. Hydrophobic interactions occur between nonpolar amino acids, causing them to cluster together in the protein's interior. These three types of side bonds play a crucial role in determining the overall structure and function of the protein.Rate this question:
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- 16.
A helix is?
- A.
Spiral-shaped
- B.
Round
- C.
Rectangular
- D.
Square
Correct Answer
A. Spiral-shapedExplanation
A helix is a shape that resembles a spiral. It is characterized by a curved or coiled structure that follows a consistent pattern. This spiral-shaped structure can be observed in various natural and man-made objects, such as DNA molecules, snail shells, and springs. The term "helix" is derived from the Greek word "helix" meaning "spiral."Rate this question:
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- 17.
Alternating bands of grey & pigmented hair throughout the length of the hair strain is called?
- A.
Hypertrichosis
- B.
Pityriasis
- C.
Ringed hair
- D.
Scutula
Correct Answer
C. Ringed hairExplanation
Ringed hair refers to the presence of alternating bands of grey and pigmented hair throughout the length of the hair strand. This condition is characterized by the appearance of rings or bands of different colors along the hair shaft. It is a cosmetic condition and does not cause any harm or medical complications.Rate this question:
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- 18.
Which of the following is NOT one of the three types of side bonds of the cortex?
- A.
Disulfide bonds
- B.
Hydrogen bonds
- C.
Salt bonds
- D.
Cortex bonds
Correct Answer
D. Cortex bondsExplanation
The given answer, "Cortex bonds," is not one of the three types of side bonds of the cortex. The three types of side bonds of the cortex are disulfide bonds, hydrogen bonds, and salt bonds. Cortex bonds are not recognized as a type of side bond in the cortex.Rate this question:
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- 19.
Which layer of hair provides a barrier that protects the inner structure of hair?
- A.
Hair root
- B.
Hair cuticle
- C.
Medulla
- D.
Cortex
Correct Answer
B. Hair cuticleExplanation
The hair cuticle is the correct answer because it is the outermost layer of the hair shaft and acts as a protective barrier for the inner structure of the hair. It consists of overlapping scales that help to prevent damage and dehydration of the hair by sealing the hair shaft. The cuticle also plays a role in determining the texture and appearance of the hair.Rate this question:
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- 20.
The thickened, club-shaped structure that forms the lower part of the hair root is the?
- A.
Hair bulb
- B.
Cortex
- C.
Medulla
- D.
Hair follicle
Correct Answer
A. Hair bulbExplanation
The hair bulb is the thickened, club-shaped structure that forms the lower part of the hair root. It is located at the base of the hair follicle and contains the actively dividing cells that produce the hair shaft. The hair bulb also contains the papilla, which supplies nutrients to the growing hair. The cortex and medulla are layers within the hair shaft, while the hair follicle is the structure that surrounds and supports the hair.Rate this question:
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- 21.
Which of the following statements is true?
- A.
Anyone of any race can have straight to extremely curly hair
- B.
Shaving hair on the head makes it grow back faster, darker & coarser
- C.
Scalp massage increase hair growth
- D.
Gray hair is coarser & more resistant than pigmented hair
Correct Answer
A. Anyone of any race can have straight to extremely curly hairExplanation
The statement "Anyone of any race can have straight to extremely curly hair" is true because hair texture is determined by the shape of the hair follicle, which can vary among individuals regardless of their race. This means that people of any race can have straight, wavy, or curly hair, ranging from mild to extremely curly.Rate this question:
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- 22.
Pheomelanin provides hair colors ranging from?
- A.
Gray to blond
- B.
Red to blond
- C.
Brown to black
- D.
Red to black
Correct Answer
B. Red to blondExplanation
Pheomelanin is a pigment that is responsible for providing red and blonde hair colors. It is a type of melanin that is found in varying amounts in individuals with different hair colors. Higher levels of pheomelanin result in red hair, while lower levels result in blonde hair. Therefore, the correct answer is "Red to blond".Rate this question:
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- 23.
Extremely curly hair does NOT typically?
- A.
Have a tendency to knot
- B.
Have low elasticity
- C.
Have a fairly regular & uniform diameter along a single strand
- D.
Break easily
Correct Answer
C. Have a fairly regular & uniform diameter along a single strandExplanation
Extremely curly hair does not typically have a fairly regular and uniform diameter along a single strand. Curly hair tends to have variations in diameter, resulting in a more irregular texture.Rate this question:
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- 24.
The average hair density is about how many hairs per square inch?
- A.
2,200
- B.
500
- C.
5,000
- D.
1,200
Correct Answer
A. 2,200Explanation
The average hair density refers to the number of hairs present in a given area, specifically per square inch. In this case, the correct answer is 2,200, which means that on average, there are approximately 2,200 hairs per square inch.Rate this question:
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- 25.
Amino acids are joined by __________ bonds.
- A.
Side
- B.
Amino
- C.
Compound
- D.
Peptide
Correct Answer
D. PeptideExplanation
Amino acids are joined by peptide bonds. A peptide bond is a type of covalent bond that forms between the carboxyl group of one amino acid and the amino group of another amino acid. This bond is formed through a dehydration reaction, where a water molecule is removed. Peptide bonds are responsible for linking amino acids together to form proteins.Rate this question:
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- 26.
Which layer of hair consists of transparent, scale-like cells?
- A.
Hair root
- B.
Medulla
- C.
Cortex
- D.
Hair cuticle
Correct Answer
D. Hair cuticleExplanation
The hair cuticle is the outermost layer of the hair shaft. It consists of transparent, scale-like cells that overlap each other like shingles on a roof. These cells provide a protective barrier for the inner layers of the hair, and they also help to maintain the integrity and strength of the hair strand.Rate this question:
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- 27.
The measurement of the individual hair strands on 1 square inch of the hair scalp is hair?
- A.
Elasticity
- B.
Density
- C.
Texture
- D.
Porosity
Correct Answer
B. DensityExplanation
Density is the correct answer because it refers to the number of individual hair strands present in a given area. In this case, the measurement is taken on 1 square inch of the hair scalp, indicating the concentration of hair strands within that specific area. Elasticity, texture, and porosity are not relevant to measuring the number of hair strands in a given area.Rate this question:
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- 28.
Hair that has the largest diameter & usually requires more processing time is?
- A.
Medium
- B.
Straight
- C.
Fine
- D.
Coarse
Correct Answer
D. CoarseExplanation
Coarse hair refers to hair that has a larger diameter compared to other types of hair. This means that each individual strand of coarse hair is thicker. Due to its larger diameter, coarse hair usually requires more processing time, whether it's for styling, coloring, or other treatments. This is because the larger diameter of each strand makes it more resistant to chemical processes and heat styling. Therefore, coarse hair requires more time and effort to achieve desired results compared to hair with smaller diameters.Rate this question:
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- 29.
The technical term used to describe gray hair is?
- A.
Malassezia
- B.
Canities
- C.
Hypertrichosis
- D.
Pityriasis
Correct Answer
B. CanitiesExplanation
Canities is the correct answer because it is the technical term used to describe gray hair. It refers to the loss of pigmentation in the hair, resulting in a gray or white color. Malassezia is a type of fungus that can cause skin conditions, Hypertrichosis is excessive hair growth, and Pityriasis is a skin condition characterized by flaking and scaling.Rate this question:
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- 30.
Hair that forms a circular growing pattern, as on the crown of the head, is called a?
- A.
Hair stream
- B.
Cowlick
- C.
Whorl
- D.
Part
Correct Answer
C. WhorlExplanation
A whorl is a term used to describe hair that forms a circular growing pattern, typically found on the crown of the head. It is characterized by hair that grows in a circular or spiral direction, creating a distinct pattern. This term is commonly used in the field of hair analysis and can help identify individuals based on their unique hair patterns. A whorl is different from a cowlick, which refers to a tuft or section of hair that grows in a different direction from the rest of the hair.Rate this question:
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- 31.
The five major elements in skin & hair are referred to as the __________ elements.
- A.
Amino
- B.
COHNS
- C.
Hair
- D.
TRASK
Correct Answer
B. COHNSExplanation
The five major elements in skin & hair are referred to as the COHNS elements. COHNS stands for Carbon, Oxygen, Hydrogen, Nitrogen, and Sulfur, which are the essential elements found in proteins, nucleic acids, and other important molecules in the skin and hair. These elements are crucial for maintaining the structure, function, and overall health of the skin and hair.Rate this question:
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- 32.
The ability of the hair to absorb moisture is called?
- A.
Porosity
- B.
Texture
- C.
Elasticity
- D.
Stream
Correct Answer
A. PorosityExplanation
Porosity refers to the hair's ability to absorb moisture. It is a measure of how easily water and other substances can penetrate the hair shaft. Hair with high porosity absorbs moisture quickly and easily, while hair with low porosity has a hard time absorbing moisture. Porosity is an important factor to consider when choosing hair care products and styling techniques, as it affects how the hair retains moisture and reacts to various treatments.Rate this question:
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- 33.
Most of the total weight of hair comes from which layer of the hair?
- A.
Hair root
- B.
Hair cuticle
- C.
Medulla
- D.
Cortex
Correct Answer
D. CortexExplanation
The cortex is the correct answer because it is the middle layer of the hair shaft and makes up the majority of the hair's weight. It contains the pigment that gives hair its color and provides strength and elasticity to the hair. The medulla is the innermost layer, but it is not present in all hair types, so it does not contribute significantly to the overall weight of hair. The hair cuticle is the outermost layer and while it plays a role in protecting the hair, it is thin and does not contribute much to the weight. The hair root is not part of the hair shaft and is not considered when determining the weight of hair.Rate this question:
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- 34.
The ability of the hair to stretch & return to its original length without breaking is called?
- A.
Stream
- B.
Elasticity
- C.
Density
- D.
Texture
Correct Answer
B. ElasticityExplanation
Elasticity refers to the ability of hair to stretch and then return to its original length without breaking. This property is important for hair as it allows it to withstand tension and manipulation without snapping or becoming damaged. Hair with good elasticity is less prone to breakage and can better withstand styling techniques such as heat and chemical treatments.Rate this question:
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- 35.
The _________ is the tube-like depression in the skin or scalp that contains the hair root.
- A.
Hair bulb
- B.
Dermal papilla
- C.
Hair shaftÂ
- D.
Hair follicleÂ
Correct Answer
D. Hair follicleÂExplanation
The hair follicle is the tube-like depression in the skin or scalp that contains the hair root. It is responsible for producing and nourishing the hair. The hair bulb, dermal papilla, and hair shaft are all components of the hair follicle, but the hair follicle itself is the structure that surrounds and protects the hair root.Rate this question:
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- 36.
Vellus hair almost never has a?
- A.
Medulla
- B.
Shaft
- C.
Cuticle
- D.
Cortex
Correct Answer
A. MedullaExplanation
Vellus hair refers to the fine, short, and barely noticeable hair that covers most of our body. Unlike terminal hair (such as scalp hair), vellus hair almost never has a medulla. The medulla is the innermost layer of the hair shaft and is composed of loosely packed cells. Since vellus hair is thin and fine, it lacks the medulla, which is commonly found in thicker and coarser terminal hair.Rate this question:
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- 37.
Peptide bonds are also known as?
- A.
Protein
- B.
Polypeptide chains
- C.
End bonds
- D.
Side bonds
Correct Answer
C. End bondsExplanation
Peptide bonds are not known as "end bonds" or "side bonds" as stated in the options. Peptide bonds are actually the chemical bonds that link amino acids together to form polypeptide chains, which eventually fold into proteins. Therefore, the correct answer is "polypeptide chains" as it accurately describes the structure formed by peptide bonds.Rate this question:
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- 38.
The condition characterized by the excessive production & accumulation of skin cells is?
- A.
Tinea
- B.
Monilethrix
- C.
Pityriasis
- D.
Alopecia
Correct Answer
C. PityriasisExplanation
Pityriasis is the correct answer because it is a condition characterized by the excessive production and accumulation of skin cells. This condition can result in the formation of dry, flaky patches on the skin, which can be itchy or cause discomfort. It is commonly known as dandruff when it affects the scalp, but it can also occur on other parts of the body. Tinea, Monilethrix, and Alopecia are not associated with the excessive production and accumulation of skin cells, making them incorrect answers.Rate this question:
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- 39.
Generally, only which type of hair contains a medulla?
- A.
Naturally blond hair
- B.
Thick, coarse hair
- C.
Naturally brown hair
- D.
Very fine hair
Correct Answer
B. Thick, coarse hairExplanation
Thick, coarse hair contains a medulla because the medulla is a central core within the hair shaft that is composed of cells. This core is typically found in thicker and coarser hair types, providing structural support and adding to the overall strength of the hair strand. In contrast, fine hair usually lacks a medulla or has a very small and less prominent one. Naturally blond or brown hair does not determine the presence or absence of a medulla, as it is primarily dependent on the hair's thickness and coarseness.Rate this question:
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- 40.
Proteins are made of long chain of?
- A.
Canities
- B.
Amino Acids
- C.
Helices
- D.
Elements
Correct Answer
B. Amino AcidsExplanation
Proteins are made up of long chains of amino acids. Amino acids are organic compounds that contain an amino group (-NH2) and a carboxyl group (-COOH). These amino acids are linked together through peptide bonds to form polypeptide chains, which then fold into specific three-dimensional structures to create functional proteins. Therefore, the correct answer is amino acids.Rate this question:
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- 41.
New hair is produced during the _______ phase, or growing phase, of hair growth?
- A.
Paragen
- B.
Anagen
- C.
Telogen
- D.
Catagen
Correct Answer
B. AnagenExplanation
During the anagen phase of hair growth, new hair is produced. This is the active phase where the hair follicles are actively dividing and producing new cells. The hair shaft grows longer during this phase, and it can last for several years. After the anagen phase, the hair enters the catagen phase, followed by the telogen phase, where the hair stops growing and eventually falls out. Therefore, the anagen phase is the correct answer as it specifically refers to the phase of hair growth when new hair is produced.Rate this question:
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- 42.
The wave pattern of the hair to the ______ of the hair strand.
- A.
Shape
- B.
Weight
- C.
Color
- D.
Density
Correct Answer
A. ShapeExplanation
The wave pattern of the hair refers to the way the hair naturally curls or falls. This wave pattern is determined by the shape of the hair strand itself. The shape of the hair strand can vary from straight to wavy to curly, and this determines the overall wave pattern of the hair. Weight, color, and density do not directly affect the wave pattern of the hair.Rate this question:
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- 43.
When a parasite called a mite burrows under the skin, the result is?
- A.
Dandruff
- B.
Scabies
- C.
Tinea
- D.
Head lice
Correct Answer
B. ScabiesExplanation
Scabies is caused by a parasite called a mite that burrows under the skin. This infestation results in intense itching and a rash, typically in areas such as the wrists, elbows, and genitals. Dandruff is a scalp condition characterized by flaking skin, not caused by mites burrowing under the skin. Tinea refers to a group of fungal infections that can affect the skin, hair, or nails. Head lice are parasitic insects that infest the scalp and hair, but they do not burrow under the skin like mites do.Rate this question:
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- 44.
Which of the following conditions is an autoimmune disorder?
- A.
Alopecia Areata
- B.
Alopecia Totalis
- C.
Androgenic Alopecia
- D.
Postpartum Alopecia
Correct Answer
A. Alopecia AreataExplanation
Alopecia Areata is an autoimmune disorder where the immune system mistakenly attacks hair follicles, resulting in hair loss. This condition is characterized by patchy hair loss on the scalp or other areas of the body. It is believed to be caused by a combination of genetic and environmental factors. Unlike other types of hair loss such as Alopecia Totalis (complete loss of scalp hair), Androgenic Alopecia (pattern hair loss), or Postpartum Alopecia (hair loss after childbirth), Alopecia Areata is specifically classified as an autoimmune disorder.Rate this question:
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- 45.
Hydroxide chemical hair relaxer break disulfide bonds & convert them to?
- A.
Hydrogen bonds
- B.
Salt bonds
- C.
Lanthionine bonds
- D.
Peptide bonds
Correct Answer
C. Lanthionine bondsExplanation
Hydroxide chemical hair relaxers break disulfide bonds, which are responsible for the hair's natural curl or wave pattern. These relaxers convert the disulfide bonds into lanthionine bonds. Lanthionine bonds are formed by the reaction between the hydroxide ions in the relaxer and the cysteine amino acids in the hair. The formation of lanthionine bonds results in permanently straightened hair.Rate this question:
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- 46.
Which types of side bond can be broken by water or heat?
- A.
Hydrogen bonds
- B.
Salt bonds
- C.
Disulfide bond
- D.
Cortex bond
Correct Answer
A. Hydrogen bondsExplanation
Hydrogen bonds can be broken by water or heat. Hydrogen bonds are formed between a hydrogen atom and an electronegative atom, such as oxygen or nitrogen. These bonds are relatively weak and can be disrupted by the presence of water molecules or an increase in temperature. Water molecules can compete with the hydrogen bond, breaking it and forming new hydrogen bonds with the electronegative atom. Similarly, an increase in temperature can provide enough energy to overcome the attraction between the hydrogen and electronegative atom, resulting in the breaking of the hydrogen bond.Rate this question:
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- 47.
Disulfide bonds account for about ______ of the hair’s overall strength?
- A.
One-half
- B.
One-quarter
- C.
Three-quarters
- D.
One-third
Correct Answer
D. One-thirdExplanation
Disulfide bonds contribute to approximately one-third of the hair's overall strength. These bonds are formed between sulfur atoms in the hair's protein structure, creating a strong and stable network. Without these bonds, the hair would be weaker and more prone to breakage.Rate this question:
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- 48.
How many hair growth treatments have been approved by the FDA for sale in the United States?
- A.
None
- B.
One
- C.
Over a dozen
- D.
Two
Correct Answer
D. TwoExplanation
The FDA has approved two hair growth treatments for sale in the United States.Rate this question:
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- 49.
The condition that describes abnormal growth of hair is?
- A.
Trichoptilosis
- B.
Trichorrhexis Nodosa
- C.
Pediculosis Capitis
- D.
Hypertrichosis
Correct Answer
D. HypertrichosisExplanation
Hypertrichosis is the correct answer because it is a condition that describes abnormal growth of hair. It is characterized by excessive hair growth on areas of the body where hair does not normally grow or by hair that is longer, thicker, or darker than usual. This condition can be either congenital (present at birth) or acquired later in life. Hypertrichosis can be localized, affecting only specific areas, or generalized, affecting the entire body. It can be caused by genetic factors, hormonal imbalances, certain medications, or underlying medical conditions.Rate this question:
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- 50.
Which condition is characterized by dry, sulfur-yellow, cuplike crusts on the scalp?
- A.
Tinea Capitis
- B.
Tinea Barbae
- C.
Tinea Favosa
- D.
Pityriasis Steatoides
Correct Answer
C. Tinea FavosaExplanation
Tinea Favosa is a condition characterized by dry, sulfur-yellow, cuplike crusts on the scalp. It is a type of fungal infection that affects the scalp and hair follicles. The crusts are often described as resembling a honeycomb or a piece of bread. This condition is caused by a fungus called Trichophyton schoenleinii and can cause hair loss, itching, and inflammation. Treatment usually involves antifungal medications to eliminate the infection and promote healing of the scalp.Rate this question:
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Mar 22, 2023Quiz Edited by
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Aug 20, 2020Quiz Created by
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