1.
The scientific study of hair and its diseases and are is called?
Correct Answer
A. Trichology
Explanation
Trichology is the scientific study of hair and its diseases. It involves the examination of the hair and scalp to diagnose and treat various hair-related conditions. Trichologists are experts in identifying hair disorders, such as hair loss, dandruff, and scalp infections, and providing appropriate treatments. They also study the structure and function of hair, including its growth cycle, composition, and characteristics. By understanding trichology, professionals can offer effective solutions for maintaining healthy hair and treating hair-related issues.
2.
Is the part of the hair located below the surface of the epidermis is called?
Correct Answer
A. Hair root
Explanation
The part of the hair located below the surface of the epidermis is called the hair root. This is the part of the hair that is anchored in the hair follicle and is responsible for nourishing and supporting the hair shaft. The hair root also contains the hair bulb, which is the living part of the hair that produces new cells and contributes to hair growth. The hair shaft, on the other hand, refers to the visible part of the hair that extends beyond the surface of the skin.
3.
Is the tube-like depression or pocket in the skin or scalp that contains the hair root is called?
Correct Answer
B. Hair follicle
Explanation
The tube-like depression or pocket in the skin or scalp that contains the hair root is called the hair follicle. This is where the hair growth begins, as the hair follicle nourishes and supports the hair root, allowing it to grow. The hair follicle also plays a role in determining the texture and thickness of the hair.
4.
Is the portion of the hair that projects above the epidermis is called?
Correct Answer
A. Hair shaft
Explanation
The portion of the hair that projects above the epidermis is called the hair shaft. It is the visible part of the hair that we can see on our scalp or body. The hair shaft is made up of dead cells that have been pushed up through the hair follicle and hardened. It is responsible for giving hair its length, color, and texture. The hair shaft can vary in thickness and shape depending on factors such as genetics and hair care practices.
5.
Is the lowest part of a hair strand is called?
Correct Answer
A. Hair bulb
Explanation
The lowest part of a hair strand is called the hair bulb. This is where the hair follicle originates and where the hair growth begins. The hair bulb is located at the base of the hair follicle and contains the dermal papilla, which supplies nutrients to the growing hair. It also contains cells that produce the hair shaft and determine its color and texture. The hair bulb plays a crucial role in the overall health and growth of the hair.
6.
Is the small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb is called what?
Correct Answer
A. Dermal papilla
Explanation
The small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb is called the dermal papilla. This structure plays a crucial role in hair growth and development by supplying nutrients and oxygen to the hair follicle. It also contains specialized cells that produce and regulate hair pigmentation. The dermal papilla is essential for the proper functioning and health of the hair follicle.
7.
Is the small, involuntary muscle in the base of the hair follicle is called what?
Correct Answer
A. Arrector pili muscle
Explanation
The small, involuntary muscle in the base of the hair follicle is called the arrector pili muscle. This muscle is responsible for causing hair to stand up or "goosebumps" when it contracts. It is attached to the hair follicle on one end and to the dermis on the other end. When it contracts, it pulls on the hair follicle, causing the hair to become more erect. This response is often triggered by cold temperatures or emotional stimuli such as fear or excitement.
8.
Are the oil glands in the skin that are connected to the hair follicles are called?
Correct Answer
B. Sebaceous glands
Explanation
The oil glands in the skin that are connected to the hair follicles are called sebaceous glands. These glands are responsible for producing sebum, an oily substance that helps to moisturize and protect both the hair and the skin. Sebum helps to keep the hair and skin hydrated, while also providing a protective barrier against bacteria and other harmful substances.
9.
Is the outermost layer of the hair is called what?
Correct Answer
B. Hair cuticle
Explanation
The outermost layer of the hair is called the hair cuticle. It is a protective layer made up of overlapping scales that help to shield the inner layers of the hair shaft. The cuticle plays a crucial role in maintaining the health and strength of the hair by preventing damage and moisture loss. It also gives the hair its characteristic smooth and shiny appearance.
10.
Is the middle layer of the hair is called?
Correct Answer
B. Cortex
Explanation
The middle layer of the hair is called the cortex. The cortex is responsible for giving the hair its strength, elasticity, and color. It contains melanin, which determines the hair's pigmentation. The cortex also contains proteins called keratin, which provide structure and support to the hair. The medulla, on the other hand, is the innermost layer of the hair and is not always present in all hair types. Amino acids and proteins are important components of the hair, but they are not specifically associated with the middle layer.
11.
Is the innermost layer of the hair and is composed of round cells is called?
Correct Answer
A. Medulla
Explanation
The innermost layer of the hair is called the medulla. It is composed of round cells. The medulla is responsible for providing structural support to the hair strand. It is not always present in every hair strand and can vary in thickness. The medulla also plays a role in determining the overall thickness and strength of the hair.
12.
Process by which newly formed cells in the hair bulb mature, move upward, lose their nucleus, and die is called what?
Correct Answer
A. Keratinization
Explanation
Keratinization is the process by which newly formed cells in the hair bulb mature, move upward, lose their nucleus, and eventually die. During this process, the cells produce the protein keratin, which gives hair its strength and structure. This process is essential for the growth and maintenance of healthy hair. Hydrogen bond, COHNS elements, and side bonds are not directly related to the maturation and death of hair cells, making keratinization the correct answer.
13.
Hair is approximately ______ percent protein.
Correct Answer
B. 90
Explanation
Hair is composed primarily of a protein called keratin. Keratin makes up about 90% of the hair structure, providing strength and elasticity. This high protein content is what gives hair its unique characteristics and allows it to grow and withstand daily wear and tear. Therefore, the correct answer is 90%.
14.
The major elements that make up human hair are carbon, oxygen, hydrogen and what?
Correct Answer
B. Nitrogen and sulfur
Explanation
Human hair is primarily composed of carbon, oxygen, hydrogen, nitrogen, and sulfur. Nitrogen is an essential component of amino acids, which are the building blocks of proteins. Since hair is made up of a protein called keratin, nitrogen is necessary for its formation. Sulfur is also present in hair, as it forms disulfide bonds between protein molecules, contributing to the strength and structure of the hair strand. Therefore, the correct answer is "nitrogen and sulfur."
15.
The major elements that make up human hair are carbon, oxygen, hydrogen, nitrogen, and sulfur and are often referred as what?
Correct Answer
C. COHNS element
Explanation
The major elements that make up human hair are carbon, oxygen, hydrogen, nitrogen, and sulfur. These elements are often referred to as the COHNS elements.
16.
Units that are joined together end to end like pop beads are what?
Correct Answer
D. Amino acids
Explanation
Amino acids are the building blocks of proteins. They are joined together end to end to form long chains, just like pop beads that are connected to each other. Therefore, the correct answer is amino acids.
17.
Also known as ends bonds, chemical bond that joins amino acids is what?
Correct Answer
A. Peptide bonds
Explanation
Peptide bonds are the chemical bonds that join amino acids together to form proteins. They are formed through a condensation reaction, where the carboxyl group of one amino acid reacts with the amino group of another amino acid, resulting in the formation of a peptide bond and the release of a water molecule. Peptide bonds play a crucial role in the structure and function of proteins, as they determine the sequence of amino acids and contribute to the overall shape and stability of the protein molecule.
18.
A long chain of amino acid linked by peptide bonds are called?
Correct Answer
C. Polypeptide chain
Explanation
A long chain of amino acids linked by peptide bonds is called a polypeptide chain. This chain forms the backbone of a protein molecule and determines its structure and function. Proteins are made up of one or more polypeptide chains, folded into specific shapes to carry out various biological processes. Side bonds and helix are not accurate terms to describe a long chain of amino acids linked by peptide bonds.
19.
Are long, coiled complex polypeptides made of amino acids
Correct Answer
B. Proteins
Explanation
Proteins are long, coiled complex polypeptides made of amino acids. They are essential macromolecules in living organisms, performing various functions such as structural support, enzymatic activity, and transportation of molecules. The structure of proteins is determined by the sequence of amino acids and their interactions, including hydrogen bonds and side bonds, which contribute to the formation of the coiled helix structure. Therefore, proteins are the correct answer in this context.
20.
The spiral shape of a coiled protein is called?
Correct Answer
B. Helix
Explanation
The spiral shape of a coiled protein is called a helix. A helix is a three-dimensional structure formed by a polypeptide chain, where the chain twists around itself in a spiral manner. This structure is stabilized by hydrogen bonds between the amino acid residues within the chain. The helix shape is important for the stability and functionality of proteins, as it allows them to interact with other molecules and perform their specific functions in the body.
21.
Bonds that cross-link the polypeptide chains together and are responsible for the extreme strength and elasticity of human hair is called what?
Correct Answer
C. Side bonds
Explanation
Side bonds are responsible for the extreme strength and elasticity of human hair. These bonds cross-link the polypeptide chains together, providing structural stability to the hair. Hydrogen bonds are weaker and temporary, while salt bonds are also weaker and can be easily broken. Disulfide bonds are strong and permanent, but they are not the primary bonds responsible for the strength and elasticity of human hair. Therefore, the correct answer is side bonds.
22.
Is a weak, physical, cross-link side bond that is easily broken by water or heat Is called what?
Correct Answer
A. Hydrogen bonds
Explanation
Hydrogen bonds are weak, physical, cross-link side bonds that can be easily broken by water or heat. They form between a hydrogen atom and an electronegative atom, such as oxygen or nitrogen. These bonds play a crucial role in various biological processes, such as protein folding and DNA structure. Unlike stronger covalent bonds, hydrogen bonds are easily disrupted, allowing for flexibility and dynamic interactions in molecules. Therefore, hydrogen bonds are the correct answer in this context.
23.
Is also a weak, physical, cross-link side bond between adjacent polypeptide chains
Correct Answer
A. Salt bonds
Explanation
Salt bonds refer to weak, physical, cross-link side bonds between adjacent polypeptide chains. These bonds are formed between oppositely charged amino acid side chains, such as the negatively charged carboxyl group (-COO-) and the positively charged amino group (-NH3+). The attraction between these opposite charges creates a bond that helps stabilize the protein structure. Salt bonds are weaker than disulfide bonds, which involve covalent bonds between sulfur atoms, and lanthionine bonds, which involve sulfur-sulfur bonds. Cystine, on the other hand, is a type of amino acid that can form disulfide bonds.
24.
Is a strong, chemical, side bond that is very different from the physical side bond of a hydrogen bond or salt bond is what?
Correct Answer
B. Disulfide bond
Explanation
A disulfide bond is a strong, chemical side bond that is different from the physical side bonds of hydrogen bonds or salt bonds. This type of bond is formed between two sulfur atoms in a protein, resulting in the formation of a covalent bond. Disulfide bonds play a crucial role in stabilizing the structure of proteins and can contribute to their overall function and stability.
25.
An amino acid joined with another cysteine amino acid to create cysteine amino acid is called what?
Correct Answer
A. Cysteline
Explanation
The correct answer is cystine. Cystine is formed when two cysteine amino acids are joined together through a disulfide bond. This bond is formed between the sulfur atoms of the two cysteine molecules. Cystine is an important amino acid that plays a role in protein structure and function.
26.
Joins together two polypeptide strands is what?
Correct Answer
B. Cystine
Explanation
Cystine is a type of amino acid that forms when two cysteine molecules come together and are joined by a disulfide bond. This bond is strong and stable, and it helps to stabilize the structure of proteins by linking different parts of the polypeptide strands together. Therefore, cystine plays a crucial role in joining together two polypeptide strands. Lanthionine bonds are not involved in joining polypeptide strands, melanin is a pigment responsible for hair and skin color, and wave pattern is unrelated to the joining of polypeptide strands.
27.
The bonds created when disulfide bonds are broken by hydroxide chemical hair relaxers after the relaxer is rinsed from the hair is what?
Correct Answer
A. Lanthionine bonds
Explanation
When disulfide bonds are broken by hydroxide chemical hair relaxers, the resulting bonds that are formed are called lanthionine bonds. These bonds are created between the sulfur atoms of cysteine residues in the hair protein, forming a new crosslink. Lanthionine bonds are responsible for the straightening effect of hair relaxers, as they alter the natural curl pattern of the hair.
28.
Are the tiny grains of pigment in the cortex that give natural color to the hair is called what?
Correct Answer
C. Melanin
Explanation
Melanin is the correct answer because it is the pigment responsible for giving natural color to the hair. It is produced by cells called melanocytes in the cortex of the hair. Melanin comes in two forms: eumelanin, which gives dark brown to black color, and pheomelanin, which gives red to yellow color. The presence and ratio of these two types of melanin determine the hair color. Therefore, melanin is the correct term for the tiny grains of pigment in the cortex that give natural color to the hair.
29.
Provides natural dark brown to black color to the hair is called what?
Correct Answer
D. Eumelanin
Explanation
Eumelanin is a pigment that provides a natural dark brown to black color to the hair. It is responsible for determining the color of our hair, skin, and eyes. The more eumelanin present, the darker the hair color will be. Pheomelanin, on the other hand, is responsible for lighter hair colors such as blonde and red. Wave pattern refers to the natural pattern or texture of the hair, while vellus hair refers to the fine, short, and colorless hair that covers most of our body.
30.
Provides natural colors ranging from red and ginger to yellow and blond tones is called what?
Correct Answer
A. pHeomelanin
Explanation
Pheomelanin is a pigment that provides natural colors ranging from red and ginger to yellow and blond tones. It is responsible for the lighter shades of hair and skin, as opposed to eumelanin, which produces darker colors. Pheomelanin is produced by specialized cells called melanocytes and is determined by genetic factors. The presence and amount of pheomelanin in hair determine its color, making it the correct answer in this context.
31.
Hair refers to the shape of the hair strand
Correct Answer
A. Wave pattern
Explanation
The correct answer is "wave pattern" because hair refers to the shape of the hair strand. The wave pattern refers to the natural curl or wave that hair has, which can range from straight to curly. This characteristic is determined by the shape of the hair follicle and the angle at which the hair grows out of the scalp.
32.
Also known as lanugo hair, is short, fine, unpigmented, and downy hair that appears on the body is called what?
Correct Answer
C. Vellus hair
Explanation
Vellus hair, also known as lanugo hair, refers to the short, fine, unpigmented, and downy hair that appears on the body. This type of hair is different from terminal hair, which is thicker, longer, and pigmented. The anagen phase and catagen phase are stages of the hair growth cycle, while vellus hair is a specific type of hair that is present on the body.
33.
Is the long coarse, pigmented hair found on the scalp, legs, arms, and bodies of males and females is called what?
Correct Answer
A. Terminal hair
Explanation
Terminal hair refers to the long, coarse, and pigmented hair found on the scalp, legs, arms, and bodies of both males and females. This type of hair is different from vellus hair, which is short, fine, and unpigmented. The anagen phase refers to the active growth phase of hair, while the telogen phase is the resting phase. Therefore, the correct answer for the given question is terminal hair.
34.
New hair is produced is called what?
Correct Answer
D. Anagen pHase
Explanation
The anagen phase is the active growth phase of hair follicles, during which new hair is produced. This phase is characterized by rapid cell division and hair growth. It is the longest phase of the hair growth cycle and can last for several years. During the anagen phase, the hair shaft is firmly anchored in the hair follicle and receives nourishment from the blood vessels in the scalp. This is why the anagen phase is responsible for the length and thickness of the hair.
35.
Is the brief transition period between the growth and resting phases of a hair follicle is called what?
Correct Answer
B. Catogen pHase
Explanation
The brief transition period between the growth and resting phases of a hair follicle is called the catogen phase. During this phase, the hair follicle shrinks and detaches from the blood supply, preparing for the resting phase (telogen phase) where the hair stops growing. The catogen phase is an important part of the hair growth cycle and helps regulate the overall hair growth process. Alopecia and alopecia areata are conditions related to hair loss, but they are not specifically related to the transition phase of the hair follicle.
36.
Also known as resting phase, is the final phase in the hair cycle and lasts until the fully grown hair at any one time is called what?
Correct Answer
A. Telogen pHase
Explanation
The telogen phase, also known as the resting phase, is the final phase in the hair cycle. During this phase, the fully grown hair remains in the follicle but is not actively growing. This phase can last for several weeks to several months before the hair eventually falls out and a new hair begins to grow in its place. Therefore, the correct answer is telogen phase.
37.
Abnormal hair is called what?
Correct Answer
C. Alopecia
Explanation
Abnormal hair is referred to as alopecia. Alopecia is a medical term used to describe hair loss or baldness. It can occur due to various reasons such as hormonal imbalances, genetics, autoimmune disorders, or certain medical conditions. Alopecia can affect both men and women and can be temporary or permanent.
38.
Also known as androgenetic alopecia, is hair loss that is characterized by miniaturization of terminal hair tat is converted into vellus hair is called what?
Correct Answer
B. Androgeneic alopecia
Explanation
Androgenetic alopecia, also known as androgeneic alopecia, is a type of hair loss characterized by the miniaturization of terminal hair, which is then converted into vellus hair. This condition is commonly referred to as androgeneic alopecia.
39.
Is an autoimmune disorder that causes the affected hair follicles to be mistakenly attacked by a person's own immune system
Correct Answer
A. Alopecia areata
Explanation
Alopecia areata is an autoimmune disorder where the immune system mistakenly attacks the hair follicles, leading to hair loss. This condition causes patches of baldness on the scalp, eyebrows, or other areas of the body. Unlike other forms of alopecia, such as alopecia totalis or alopecia universalis which result in complete hair loss, alopecia areata is characterized by localized hair loss.
40.
Total loss of scalp hair
Correct Answer
B. Alopecia totalis
Explanation
Alopecia totalis refers to the complete loss of hair on the scalp. This condition is characterized by the absence of hair follicles, resulting in a smooth and bald scalp. Unlike alopecia universalis, which involves hair loss on the entire body, alopecia totalis specifically refers to the loss of scalp hair. Postpartum alopecia, on the other hand, is temporary hair loss that occurs after giving birth. Alopecia areata is a condition where hair loss occurs in patches on the scalp. Therefore, alopecia totalis is the correct answer as it specifically describes the total loss of hair on the scalp.
41.
Complete body hair loss is called what?
Correct Answer
A. Alopecia universalis
Explanation
Alopecia universalis refers to a condition where a person experiences complete hair loss on their entire body, including the scalp, eyebrows, eyelashes, and body hair. This condition is considered an advanced form of alopecia areata, an autoimmune disease that causes hair loss. Unlike other types of alopecia, such as postpartum alopecia (hair loss after childbirth), canities (graying or whitening of hair), or ringed hair (a condition where the hair appears to have bands of different colors), alopecia universalis results in the total absence of hair.
42.
Is temporary hair loss experienced at the end of a pregnancy is called what?
Correct Answer
D. Postpartum alopecia
Explanation
Postpartum alopecia refers to temporary hair loss that occurs in women after giving birth. This condition is caused by hormonal changes in the body, specifically a decrease in estrogen levels. During pregnancy, high levels of estrogen prolong the growth phase of hair, resulting in thicker and fuller hair. However, after childbirth, estrogen levels drop, causing hair to enter the resting phase and eventually fall out. This hair loss is usually temporary and the hair typically regrows within a few months.
43.
Is a topical medication that is put on the scalp twice a day and has been proven to stimulate hair growth is called what?
Correct Answer
D. Minoxidil
Explanation
Minoxidil is a topical medication that is applied to the scalp twice a day and has been clinically proven to stimulate hair growth. It is commonly used to treat hair loss and promote regrowth in both men and women. Minoxidil works by increasing blood flow to the hair follicles, which can help to revive dormant follicles and promote the growth of thicker, fuller hair.
44.
Is an oral prescription medication for men only is called what?
Correct Answer
B. Finasteride
Explanation
Finasteride is a medication used to treat male pattern baldness and benign prostatic hyperplasia (BPH). It works by decreasing the levels of dihydrotestosterone (DHT), a hormone that causes hair loss and prostate enlargement in men. Therefore, it is specifically prescribed for men only and is not suitable for use by women. Minoxidil, on the other hand, is a topical medication used to stimulate hair growth in both men and women. Canities refers to the graying of hair, and ringer hair is not a recognized term in relation to prescription medications.
45.
Is the technical term for gray hair is called for what?
Correct Answer
A. Canities
Explanation
Canities is the technical term for gray hair. It refers to the loss of pigment in the hair, resulting in a gray or white color. This is a natural part of the aging process and occurs when the hair follicles stop producing melanin, the pigment that gives hair its color. Canities is a common occurrence as people get older, and it can be influenced by factors such as genetics and stress. Ringed hair, hypertrichosis, and monilethrix are not terms used to describe gray hair.
46.
Is a variety of canities, characterized by alternatin bands of gray and pigmented hair throughout the length of the hair strand is called what?
Correct Answer
C. Ringed hair
Explanation
Ringed hair refers to a variety of canities where the hair strand has alternating bands of gray and pigmented hair throughout its length. This condition is characterized by the presence of distinct rings or bands of different colors on the hair strand, giving it a unique appearance. It is different from hypertrichosis, which is excessive hair growth, and monilethrix, which is a hair disorder characterized by beaded hair strands.
47.
Also known as hirsuties, is a condition of abnormal growth of the hair is called what?
Correct Answer
A. Hypertrichosis
Explanation
Hypertrichosis is the correct answer because it refers to a condition where there is abnormal growth of hair on the body. This condition can result in excessive hair growth in areas where hair is not typically present, such as the face, back, or arms. Hypertrichosis can be either congenital or acquired, and it can occur as a result of various factors including genetics, hormonal imbalances, or certain medications. Trichoptilosis, monilethrix, and fragilitas crinium are all conditions related to the hair, but they do not specifically refer to abnormal hair growth like hypertrichosis does.
48.
Is the technical term for split ends is called what?
Correct Answer
A. Trichoptilosis
Explanation
The correct answer for the technical term for split ends is trichoptilosis.
49.
Is the technical term for knotted hair is called what?
Correct Answer
B. Trichorrhexis nodosa
Explanation
Trichorrhexis nodosa is the correct answer because it is the technical term for knotted hair. Trichorrhexis nodosa refers to a condition where the hair shaft becomes weak and prone to breakage, resulting in the formation of knots or nodules along the hair strand. This condition can be caused by various factors such as excessive heat styling, chemical damage, or certain medical conditions.
50.
Is the technical term for beaded hair is called what?
Correct Answer
A. Monilethrix
Explanation
Monilethrix is the correct answer because it is a rare genetic condition that affects the hair shaft, causing it to be brittle and prone to breakage. The term "monilethrix" is derived from the Latin words "monile" meaning necklace and "thrix" meaning hair, which describes the beaded appearance of the hair strands. Fragilitas crinium refers to hair fragility, trichoptilosis is the technical term for split ends, and trichorrhexis nodosa is a condition characterized by weak points in the hair shaft leading to fraying and breakage.