Hair And Scalp Properties Quiz! Trivia

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.

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.

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.

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.

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.

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.

Postpartum Alopecia refers to temporary hair loss that occurs after giving birth. During pregnancy, hormonal changes cause an increase in hair growth, resulting in thicker and fuller hair. However, after delivery, hormone levels return to normal, and many women experience excessive shedding of hair, leading to thinning or bald spots. This condition is temporary and usually resolves on its own within a few months. Alopecia Areata is an autoimmune condition causing patchy hair loss, Androgenic Alopecia is genetic hair loss, and Alopecia Totalis refers to complete hair loss on the scalp.

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.

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.

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.

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.

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.

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.

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".

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."

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.

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.

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.

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.

Hair texture refers to the thickness or diameter of the individual hair strand. It can be classified as fine, medium, or coarse. Texture plays a significant role in determining how the hair looks, feels, and behaves. It affects how easily the hair can be styled, the level of volume and body it has, and its overall appearance. Different hair textures require different types of care and styling techniques. Length, strength, and shape are not directly related to the thickness or diameter of the hair strand, hence they are not the correct answers.

Research has shown that dandruff is caused by a fungus called Malassezia. This fungus is naturally present on the scalp and feeds on the oils produced by the hair follicles. When there is an overgrowth of Malassezia, it can lead to an inflammatory response in the scalp, causing itching and flaking of the skin, which is commonly known as dandruff.

The final phase in the hair cycle, lasting until the fully grown hair is shed, is called the telogen phase. During this phase, the hair follicle is at rest and the hair is no longer growing. Instead, it remains in the follicle until it is eventually shed and replaced by a new hair during the next anagen phase. The telogen phase typically lasts for a few months before the hair is shed naturally.

People with dry hair and scalp should use products containing emollients. Emollients are substances that help to soften and moisturize the hair and scalp. They provide hydration and nourishment to the dry hair and scalp, helping to restore moisture and prevent further dryness. Using products with a high alcohol content or strong soaps can further strip the hair and scalp of moisture, exacerbating the dryness. Shampooing frequently can also lead to dryness as it can remove natural oils from the hair and scalp. Therefore, using products containing emollients is the best choice for individuals with dry hair and scalp.

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.

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.

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.

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.

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.

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.

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.

The two parts of a mature strand of human hair are the hair root and the hair shaft. The hair root is located below the surface of the skin and is responsible for anchoring the hair in the follicle. It also contains the hair bulb, which is the living part of the hair that produces new cells. The hair shaft, on the other hand, is the visible part of the hair that extends above the skin's surface. It is composed of dead cells that have been pushed up from the hair root.

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.

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.

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.

Salt bonds can be broken by both strong alkaline and strong acidic solutions. Strong alkaline solutions have a high concentration of hydroxide ions (OH-) which can react with the salt bonds and break them. Similarly, strong acidic solutions have a high concentration of hydrogen ions (H+) which can also react with the salt bonds and break them. Therefore, both strong alkaline and strong acidic solutions have the ability to break salt bonds.

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.

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.

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.

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.

Trichorrhexis Nodosa refers to a condition in which the hair shaft becomes weak and develops nodules or knots along its length. This causes the hair to break easily and appear knotted. Gray hair, split ends, and beaded hair are not specific terms used to describe this condition.

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.

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.

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.

The study suggests that bald men are perceived as older. This could be due to the association of baldness with aging, as hair loss often occurs as men get older. Additionally, societal stereotypes and cultural norms may contribute to the perception that bald men are more mature or experienced. It is important to note that this perception may not be accurate or fair, as individual characteristics and qualities should not be solely determined by physical appearance.

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.

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.

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.

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.

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.

The FDA has approved two hair growth treatments for sale in the United States.