Cosmo Written Exam Prep3a

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  • 1/50 Questions

    Hair is primarily composed of:

    • Calcium
    • Keratin
    • Cortisone
    • Magnesium
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About This Quiz


100 sample questions to help you study for the State Board Cosmetology Exam

Cosmo Written Exam Prep3a - Quiz

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  • 2. 

    During the processing time in chemical waving, the hair has a tendency to

    • Expand

    • Harden

    • Contract

    • Circulate

    Correct Answer
    A. Expand
    Explanation
    During the processing time in chemical waving, the hair undergoes a chemical reaction that breaks down the protein structure of the hair. This allows the hair to be reshaped and take on a new form. As a result of this chemical reaction, the hair expands, becoming larger and more voluminous.

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  • 3. 

    Scalp manipulations should NOT be performed if

    • Abrasions are present

    • Henna is to be applied

    • The hair has been tinted

    • The hair has recently been brushed

    Correct Answer
    A. Abrasions are present
    Explanation
    Scalp manipulations should not be performed if abrasions are present because manipulating the scalp in this condition can cause further irritation, pain, and potential infection. Abrasions are open wounds on the skin, and any form of manipulation or application of products can hinder the healing process and worsen the condition. It is important to avoid any activity that can aggravate or introduce bacteria to the affected area.

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  • 4. 

    Why is an antiseptic applied to tweezed areas during arching?

    • To open pores

    • To eliminate pain

    • To avoid infection

    • To remove dead skin

    Correct Answer
    A. To avoid infection
    Explanation
    An antiseptic is applied to tweezed areas during arching to avoid infection. When hair is removed from the roots, it creates small openings in the skin which can potentially allow bacteria to enter and cause infection. Applying an antiseptic helps to kill or inhibit the growth of bacteria, reducing the risk of infection.

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  • 5. 

    Frequent shampooing with highly alkaline shampoo may cause the hair to become

    • Dry

    • Oily

    • Curly

    • Thick

    Correct Answer
    A. Dry
    Explanation
    Frequent shampooing with highly alkaline shampoo may cause the hair to become dry. This is because highly alkaline shampoos can strip the hair of its natural oils, leading to dryness and lack of moisture. The alkaline nature of the shampoo disrupts the pH balance of the scalp, which can further contribute to dryness. Regular use of such shampoos can also damage the hair cuticles, making the hair more prone to dryness and breakage. Therefore, it is important to choose a shampoo with a balanced pH level to maintain the hair's natural moisture and prevent dryness.

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  • 6. 

    What protects the skin from irritation and stains around the hairline?

    • Fillers

    • Protective cream

    • Talcum powder

    • Astringent

    Correct Answer
    A. Protective cream
    Explanation
    A protective cream is used to protect the skin from irritation and stains around the hairline. It forms a barrier between the skin and external factors, such as hair products or environmental pollutants, preventing them from causing irritation or staining the skin. By applying a protective cream, the skin is shielded and kept safe from potential damage, ensuring a healthier and cleaner appearance around the hairline.

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  • 7. 

    Prelightening the hair is usually necessary when using a

    • Toner

    • Metallic tint

    • One process tint

    • Temporary color

    Correct Answer
    A. Toner
    Explanation
    Prelightening the hair is usually necessary when using a toner because toners are used to neutralize unwanted tones in the hair, such as brassiness or yellowing. In order for the toner to work effectively and achieve the desired result, the hair needs to be prelightened to a certain level. This is because toners are semi-permanent hair color products that deposit color onto the hair shaft, and they work best on hair that is already lightened. Therefore, prelightening the hair is an important step when using a toner.

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  • 8. 

    Before giving a chemical wave, the hair should be:

    • Slightly dampened

    • Brushed vigorously

    • Given a cream rinse

    • Analyzed and shampooed

    Correct Answer
    A. Analyzed and shampooed
    Explanation
    Before giving a chemical wave, it is important to analyze the hair to determine its condition and suitability for the treatment. Shampooing the hair is necessary to remove any dirt, oil, or product buildup that may interfere with the chemical process. This ensures that the hair is clean and ready for the wave solution.

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  • 9. 

    To add strength and body to damaged hair, it is advisable to give a

    • Massage treatment

    • Hair analysis

    • Permanent wave

    • Conditioning treatment

    Correct Answer
    A. Conditioning treatment
    Explanation
    A conditioning treatment is the correct answer because it helps to add strength and body to damaged hair. Conditioning treatments typically involve the use of products that contain nourishing ingredients such as proteins, vitamins, and moisturizers. These ingredients penetrate the hair shaft, providing hydration and nutrients to the hair, which can help to repair and strengthen damaged strands. Additionally, conditioning treatments can also help to improve the overall appearance and manageability of the hair, making it an effective solution for damaged hair.

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  • 10. 

    In a lightener retouch, hair breakage may result if

    • The lightener overlaps

    • The hair is underprocessed

    • A weak lightener is used

    • A short lightening time is used

    Correct Answer
    A. The lightener overlaps
    Explanation
    When a lightener overlaps during a retouch, it means that the product is applied on previously lightened hair, causing the hair to be exposed to the lightening chemicals again. This can lead to hair breakage because the repeated exposure to the strong chemicals can weaken the hair structure and cause it to become brittle and prone to breakage. It is important to avoid overlapping during a lightener retouch to prevent damage to the hair.

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  • 11. 

    If a temporary color rinse is applied to normal hair, it will

    • Coat the cuticle layer

    • Coat the medulla layer

    • Penetrate the cuticle

    • Penetrate the medulla

    Correct Answer
    A. Coat the cuticle layer
    Explanation
    A temporary color rinse is designed to only coat the outer layer of the hair, which is the cuticle layer. It does not have the ability to penetrate deeper into the hair shaft, such as the medulla layer. Therefore, when a temporary color rinse is applied to normal hair, it will coat the cuticle layer, giving the hair a temporary color change.

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  • 12. 

    Which of the following is the peak of a finger wave?

    • Line

    • Trough

    • Ridge

    • C-shape

    Correct Answer
    A. Ridge
    Explanation
    A finger wave is a hairstyle that involves creating S-shaped waves in the hair. The peak of a finger wave refers to the highest point of the wave, where the hair is raised and creates a ridge-like shape. This ridge is formed by combing the hair in a specific pattern and securing it with styling products. Therefore, the correct answer is "ridge."

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  • 13. 

    A lightener retouch should FIRST be applied to

    • Hair ends

    • Mid-shaft

    • Hair follicle

    • New growth

    Correct Answer
    A. New growth
    Explanation
    A lightener retouch should FIRST be applied to new growth because this is the area where the hair has recently grown out and is closest to the scalp. Applying the lightener to the new growth ensures that it is evenly and thoroughly covered, allowing for consistent and uniform results. Additionally, new growth is usually darker than the previously lightened hair, so starting with this area helps to achieve a more even overall color. Applying the lightener to the hair ends or mid-shaft first may result in uneven color or over-processing. The hair follicle is not a suitable area to apply lightener as it is the root of the hair and not accessible for direct application.

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  • 14. 

    A coiled, corkscrew shaped bacteria cell that causes syphilis and cholera is

    • Bacilli

    • Spirilla

    • Streptococci

    • Cocci

    Correct Answer
    A. Spirilla
    Explanation
    The correct answer is spirilla. Spirilla are coiled, corkscrew-shaped bacteria cells that can cause diseases such as syphilis and cholera. Bacilli are rod-shaped bacteria, streptococci are chains of spherical bacteria, and cocci are spherical bacteria. Therefore, spirilla is the most appropriate answer for the given description.

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  • 15. 

    High elevation in haircutting is used to

    • Add bulk

    • Thin hair

    • Create layers

    • Establish guidelines

    Correct Answer
    A. Create layers
    Explanation
    High elevation in haircutting is used to create layers. When hair is elevated at a high angle, it is cut shorter, resulting in layers that add dimension and movement to the hairstyle. By cutting the hair at different lengths, layers are created, giving the hair a textured and voluminous appearance. This technique is commonly used to add depth and shape to the hair, allowing for versatile styling options.

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  • 16. 

    If the cuticle is slightly raised and accepts color products easily,  the hair is:

    • Normal

    • Resistant

    • Fine

    • Coarse

    Correct Answer
    A. Normal
    Explanation
    If the cuticle is slightly raised and accepts color products easily, it indicates that the hair is in a normal condition. This means that the hair is not overly resistant or fine, and it is also not coarse. The fact that the cuticle is slightly raised suggests that the hair is healthy and able to absorb color products effectively.

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  • 17. 

    What type of manicure is suggested for dry cuticles and brittle nails?

    • Oil

    • Machine

    • Regular

    • Antiseptic

    Correct Answer
    A. Oil
    Explanation
    Oil is suggested for dry cuticles and brittle nails because it helps to moisturize and nourish the cuticles and nails, making them softer and less prone to breakage. Regular use of oil can improve the overall health and appearance of the nails, preventing them from becoming dry, brittle, and prone to splitting or peeling.

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  • 18. 

    Disulfide bonds are broken by the

    • Shampooing process

    • Winding process

    • Chemical wave solution

    • Neutralizing solution

    Correct Answer
    A. Chemical wave solution
    Explanation
    The correct answer is chemical wave solution because it is a chemical treatment used to permanently curl or straighten hair. This process involves breaking the disulfide bonds in the hair, which are responsible for the hair's natural shape and texture. By breaking these bonds, the hair can be reshaped into the desired style. Shampooing, winding, and neutralizing solutions are not specifically designed to break disulfide bonds in the same way that a chemical wave solution does.

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  • 19. 

    Which one of the following should be done to protect a sensitive scalp during a relaxer treatment?

    • Apply a protective base

    • Use a mild shampoo

    • Apply a conditioner to hair

    • Use astringent on the scalp

    Correct Answer
    A. Apply a protective base
    Explanation
    To protect a sensitive scalp during a relaxer treatment, it is important to apply a protective base. This is because relaxer treatments can be harsh on the scalp and may cause irritation or burns. Applying a protective base, such as petroleum jelly or a specialized scalp protector, creates a barrier between the relaxer and the scalp, reducing the risk of damage or discomfort. It is not recommended to use a mild shampoo, apply a conditioner, or use an astringent on the scalp as these actions do not provide the same level of protection as a protective base.

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  • 20. 

    What is the tube-like pocket that contains the hair?

    • Shaft

    • Papilla

    • Follicle

    • Arrector pili

    Correct Answer
    A. Follicle
    Explanation
    The tube-like pocket that contains the hair is called the follicle. The hair follicle is located in the dermis of the skin and is responsible for producing and nourishing the hair shaft. It also plays a role in regulating hair growth and cycles. The follicle contains the hair papilla, which supplies nutrients to the hair, and is surrounded by various structures such as the arrector pili muscle.

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  • 21. 

    Prior to a permanent wave, you should drape with a

    • Towel and plastic cape

    • Towel and cloth cape

    • Neck strip and cloth cape

    • Neck strip and cutting cape

    Correct Answer
    A. Towel and plastic cape
    Explanation
    Prior to a permanent wave, it is necessary to drape with a towel and plastic cape. This is because the towel helps to protect the client's clothing from getting wet or stained during the process, while the plastic cape provides an additional layer of protection against any chemicals or solutions used in the permanent wave. The combination of a towel and plastic cape ensures that the client remains comfortable and their clothing is kept clean and dry throughout the procedure.

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  • 22. 

    What is the most effective level of infection control?

    • Sterilization

    • Sanitation

    • Disinfection

    • Ventilation

    Correct Answer
    A. Sterilization
    Explanation
    Sterilization is the most effective level of infection control because it completely eliminates all forms of microorganisms, including bacteria, viruses, and fungi, from an object or surface. This process ensures that no infectious agents are present, reducing the risk of transmission and preventing the spread of infections. Sterilization is commonly used in medical settings for surgical instruments, equipment, and supplies to maintain a sterile environment and protect patients from potential infections.

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  • 23. 

    What type of hair is MOST difficult to press?

    • Soft and curly

    • Fine and overly curly

    • Fine and curly

    • Coarse and overly curly

    Correct Answer
    A. Coarse and overly curly
    Explanation
    Coarse and overly curly hair is the most difficult to press because it is thick, rough, and has a strong natural curl pattern. The texture of this type of hair makes it challenging to straighten and requires more heat and pressure to achieve a smooth and straight look. Additionally, the natural curl pattern tends to bounce back easily, making it harder to maintain the straightened style.

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  • 24. 

    Which portion of the hair is chemical wave solution absorbed faster?

    • At crown

    • At scalp

    • Where hair porosity is greatest

    • Where hair density is greatest

    Correct Answer
    A. Where hair porosity is greatest
    Explanation
    The correct answer is "where hair porosity is greatest". Hair porosity refers to the hair's ability to absorb and retain moisture and chemicals. When the hair has high porosity, it means that the cuticles are more open and can absorb solutions more easily. Therefore, in areas where the hair has the highest porosity, such as damaged or porous sections, the chemical wave solution will be absorbed faster compared to areas with lower porosity.

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  • 25. 

    Which of the following are tint removers designed to remove?

    • Natural pigment

    • Temporary colors

    • Artificial pigment

    • Conditioner build-up

    Correct Answer
    A. Artificial pigment
    Explanation
    Tint removers are specifically formulated to remove artificial pigment from the hair. This means that they are effective in removing hair dyes, color treatments, or any other artificial color that has been applied to the hair. Tint removers are not designed to remove natural pigment, temporary colors, or conditioner build-up.

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  • 26. 

    What is formed when two or more non-mixable substances are united with the help of a binder or gum- like substance?

    • Solution

    • Ointment

    • Emulsion

    • Suspension

    Correct Answer
    A. Emulsion
    Explanation
    An emulsion is formed when two or more non-mixable substances are united with the help of a binder or gum-like substance. In an emulsion, one substance is dispersed in the form of small droplets within another substance, creating a stable mixture. The binder or gum-like substance acts as a stabilizer, preventing the separation of the two substances over time. This allows for the uniform distribution of the non-mixable substances, resulting in a homogeneous mixture.

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  • 27. 

    To remove lightener, hair should be rinsed in water that is

    • Hot

    • Tepid

    • Cold

    • Very hot

    Correct Answer
    A. Tepid
    Explanation
    To remove lightener from hair, it is recommended to rinse it with tepid water. Tepid water refers to water that is neither too hot nor too cold, but rather at a moderate temperature. This is because using water that is too hot can cause damage to the hair, such as stripping away natural oils and causing dryness. On the other hand, water that is too cold may not effectively remove the lightener. Therefore, using tepid water ensures a gentle yet effective removal of the lightener without causing harm to the hair.

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  • 28. 

    A face that is composed of straight lines with a wide forehead and jawline is considered to be

    • Square

    • Round

    • Oblong

    • Triangular

    Correct Answer
    A. Square
    Explanation
    A face that is composed of straight lines with a wide forehead and jawline is considered to be square. This is because the straight lines and the wide forehead and jawline create a strong, angular appearance, resembling the shape of a square.

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  • 29. 

    Why is it necessary to use a conditioner-filler during a chemical relaxer retouch service?

    • Coats and seals the relaxer into the hair

    • Allows deeper penetration of relaxer into the hair shaft

    • Helps even the porosity

    • Increases neutralizing time

    Correct Answer
    A. Helps even the porosity
    Explanation
    A conditioner-filler is necessary during a chemical relaxer retouch service because it helps even out the porosity of the hair. Porosity refers to the hair's ability to absorb and retain moisture, and uneven porosity can result in an inconsistent relaxer application. By using a conditioner-filler, the hair's porosity is balanced, ensuring that the relaxer is applied evenly and effectively. This helps to achieve a more uniform and desired result in the hair texture.

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  • 30. 

    What is made of cells, blood, calcium carbonate, and calcium phosphate?

    • Nerves

    • Teeth

    • Bones

    • Tendons

    Correct Answer
    A. Bones
    Explanation
    Bones are made up of cells, blood, calcium carbonate, and calcium phosphate. The cells in bones, called osteoblasts and osteoclasts, are responsible for bone formation and remodeling. Blood vessels within bones supply oxygen and nutrients to the bone cells. Calcium carbonate and calcium phosphate provide the necessary minerals for bone strength and structure. Together, these components make up the composition of bones.

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  • 31. 

    The shortest processing time in chemical waving is usually required for hair which is

    • Fine

    • Coarse

    • Resistant

    • Lightened

    Correct Answer
    A. Lightened
    Explanation
    Lightened hair is typically more fragile and delicate compared to other types of hair. Therefore, it requires the shortest processing time in chemical waving to avoid excessive damage or breakage. This is because lightened hair has already undergone a chemical process (such as bleaching or highlighting) which weakens the hair structure, making it more susceptible to damage from further chemical treatments.

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  • 32. 

    When tinting lightened hair back to its natural shade, it is necessary to

    • Apply a filler

    • Soften the hair

    • Use a color rinse

    • Strip the hair shaft

    Correct Answer
    A. Apply a filler
    Explanation
    When lightened hair is tinted back to its natural shade, it is necessary to apply a filler. This is because lightening hair removes the natural pigments, leaving the hair porous and lacking in color. Applying a filler helps to restore the missing pigments and create a base for the desired shade to adhere to. Without a filler, the tint may not take evenly or may appear dull and lack vibrancy. Therefore, applying a filler is essential in achieving a natural and vibrant hair color.

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  • 33. 

    Metal implements should be disinfected with

    • Antibacterial soap

    • 2% boric acid

    • Hospital grade solution

    • Hydrogen peroxide

    Correct Answer
    A. Hospital grade solution
    Explanation
    Metal implements should be disinfected with a hospital grade solution because it is specifically designed to kill a wide range of microorganisms, including bacteria, viruses, and fungi. This solution is commonly used in healthcare settings to ensure proper disinfection and prevent the spread of infections. Using antibacterial soap or hydrogen peroxide may not be as effective in completely eliminating harmful pathogens from metal implements. Boric acid, on the other hand, is not commonly used as a disinfectant and may not provide sufficient antimicrobial activity.

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  • 34. 

    What facial massage movement has a soothing and relaxing effect?

    • Rolling

    • Effleurage

    • Friction

    • Vibration

    Correct Answer
    A. Effleurage
    Explanation
    Effleurage is a facial massage movement that involves gentle, gliding strokes over the skin. It is known for its soothing and relaxing effect on the face. The light pressure and rhythmic motion of effleurage help to increase blood circulation, reduce tension, and promote relaxation. This technique is commonly used in facial massages to provide a calming and comforting experience for the client.

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  • 35. 

    Which test determines if a wig is made of human hair or synthetic fiber?

    • Match

    • Patch

    • Alkalinity

    • Acid

    Correct Answer
    A. Match
    Explanation
    The test that determines if a wig is made of human hair or synthetic fiber is called the match test. This test involves taking a small strand of hair from the wig and holding a lit match close to it. If the hair melts away and smells like plastic, it is synthetic fiber. If it burns and smells like burning hair, it is human hair.

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  • 36. 

    Which condition would PREVENT a cosmetologist from performing a service on a client?

    • Psoriasis

    • Pityryasis capitus

    • Tinea capitus

    • Hypertrychosis

    Correct Answer
    A. Tinea capitus
    Explanation
    Tinea capitus is a fungal infection of the scalp that can cause hair loss and inflammation. It is highly contagious and can easily spread from person to person. Therefore, a cosmetologist would be prevented from performing a service on a client with tinea capitus to avoid spreading the infection to other clients or themselves.

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  • 37. 

    Nerves and blood vessels are found in the nail

    • Bed

    • Plate

    • Lunula

    • Cuticle

    Correct Answer
    A. Bed
    Explanation
    The correct answer is "bed" because the nerves and blood vessels are indeed found in the nail bed. The nail bed is the tissue underneath the nail plate, and it is responsible for supplying nutrients and oxygen to the nail. It also contains nerves that provide sensation to the nail. The other options, such as plate, lunula, and cuticle, do not house nerves and blood vessels in the same way as the nail bed does.

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  • 38. 

    A client with which of the following nail conditions should be referred to a physician?

    • Blue nails

    • White spots

    • Onychophagy

    • Onychomycosis

    Correct Answer
    A. Onychomycosis
    Explanation
    Onychomycosis is a fungal infection of the nails, which can cause discoloration, thickening, and crumbling of the nails. It is a condition that should be referred to a physician because it requires medical treatment, such as oral or topical antifungal medications. Referring the client to a physician ensures that they receive the appropriate diagnosis and treatment for their nail condition. Blue nails can indicate a lack of oxygen in the blood, white spots are usually harmless and can be caused by minor trauma, and onychophagy refers to nail biting, which may not require immediate medical attention.

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  • 39. 

    A chemical compound used to slow the growth of bacteria is called

    • Deodorant

    • Fungicide

    • Antiseptic

    • Astringent

    Correct Answer
    A. Antiseptic
    Explanation
    An antiseptic is a chemical compound that is used to slow down or prevent the growth of bacteria. It is commonly used to clean wounds or disinfect surfaces to reduce the risk of infection. Unlike deodorant, which is used to mask or eliminate body odor, or astringent, which is used to tighten or cleanse the skin, antiseptics specifically target bacteria and inhibit their growth. A fungicide, on the other hand, is a compound used to kill or inhibit the growth of fungi, not bacteria. Therefore, the correct answer is antiseptic.

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  • 40. 

    Which instrument should be used to slither a client's hair?

    • Razor

    • Shears

    • Clippers

    • Thinning shears

    Correct Answer
    A. Shears
    Explanation
    Shears should be used to slither a client's hair. Shears are a type of scissors that have two blades with a sharp edge, designed specifically for cutting hair. They are commonly used in hair salons and by hairstylists to create texture and remove bulk from the hair. Slithering is a cutting technique used to add movement and texture to the hair, and shears are the most appropriate tool for this technique. Razors, clippers, and thinning shears are used for different purposes and are not suitable for slithering.

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  • 41. 

    Specialized preparations that are designed to equalize porosity and deposit a base color in one application are called

    • Color fillers

    • Conditioner fillers

    • Compound fillers

    • Metallic dyes

    Correct Answer
    A. Color fillers
    Explanation
    Color fillers are specialized preparations that are designed to equalize porosity and deposit a base color in one application. This means that they help to even out the porosity of the hair, making it more receptive to color, while also depositing a base color. This can be useful when working with porous or damaged hair, as it helps to ensure a more even and consistent color result. Conditioner fillers, compound fillers, and metallic dyes are not specifically designed for this purpose, making them incorrect answers.

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  • 42. 

    Which should be used to stop the bleeding of a minor cut during a manicure?

    • Iodine

    • Styptic pencil

    • Alcohol

    • Alum powder

    Correct Answer
    A. Alum powder
    Explanation
    Alum powder should be used to stop the bleeding of a minor cut during a manicure. Alum powder has astringent properties that help constrict blood vessels and promote clotting. It can effectively stop bleeding and prevent further damage. Iodine, alcohol, and styptic pencils are not typically used for this purpose and may not be as effective in stopping bleeding.

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  • 43. 

    By highlighting the cheekbone, the area will appear

    • Diminished

    • Emphasized

    • Contoured

    • Darkened

    Correct Answer
    A. Emphasized
    Explanation
    By highlighting the cheekbone, the area will appear emphasized. This means that the cheekbone will be made more prominent or noticeable.

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  • 44. 

    The mobility of a pin curl is determined by the

    • Base

    • Stem

    • Wave

    • Diameter

    Correct Answer
    A. Stem
    Explanation
    The mobility of a pin curl is determined by the stem. The stem refers to the section of the pin curl that connects the base and the curl. A longer stem allows for more movement and flexibility in the curl, while a shorter stem creates a tighter and less movable curl. Therefore, the stem plays a crucial role in determining the mobility of a pin curl.

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  • 45. 

    Which of the following is a MAIN ingredient in a chemical hair relaxer?

    • Coal tar

    • Sodium bromide

    • Sodium hydroxide

    • Hydrogen peroxide

    Correct Answer
    A. Sodium hydroxide
    Explanation
    Sodium hydroxide is a strong alkaline compound commonly used as a main ingredient in chemical hair relaxers. It works by breaking down the disulfide bonds in the hair, allowing it to be reshaped and straightened. Sodium hydroxide is known for its high pH level and can cause skin and scalp irritation if not used properly. It is important to follow the instructions and take necessary precautions when using hair relaxers containing sodium hydroxide.

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  • 46. 

    The science of the nature, structure, function, and diseases of the muscles is called

    • Neurology

    • Myology

    • Osteology

    • Physiology

    Correct Answer
    A. Myology
    Explanation
    Myology is the correct answer because it specifically refers to the study of muscles. Neurology is the study of the nervous system, osteology is the study of bones, and physiology is the study of the functions and processes of living organisms. Therefore, myology is the most accurate term to describe the science of muscles.

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  • 47. 

    What is the pH of sodium hydroxide?

    • 2.5 to 3.5

    • 5.5 to 6.5

    • 8.5 to 9.5

    • 10.5 to 11.5

    Correct Answer
    A. 10.5 to 11.5
    Explanation
    Sodium hydroxide is a strong base, and its pH is typically very high. The correct answer is 10.5 to 11.5 because this pH range represents the alkalinity of sodium hydroxide. The high pH indicates that sodium hydroxide is highly basic and has a high concentration of hydroxide ions (OH-). This makes it a caustic substance that can cause severe burns and is commonly used in cleaning products and industrial applications.

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  • 48. 

    What is the function of keratin?

    • It protects the skin from injury

    • It nourishes the connective tissue

    • It gives flexibility to the nail

    • It forms the base of all horny tissue

    Correct Answer
    A. It forms the base of all horny tissue
    Explanation
    Keratin is a protein that plays a crucial role in the formation of various horny tissues in the body, such as hair, nails, and the outer layer of the skin. It provides strength, structure, and durability to these tissues, allowing them to withstand external stressors and protect the underlying skin from injury. Therefore, the statement "it forms the base of all horny tissue" accurately describes the function of keratin.

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  • 49. 

    What type of hair coloring is designed to last 4 to 6 shampoos?

    • Aniline derivative tints

    • Temporary rinses

    • Metallic dyes

    • Semipermanent

    Correct Answer
    A. Semipermanent
    Explanation
    Semipermanent hair coloring is designed to last 4 to 6 shampoos. Unlike permanent hair color, which penetrates the hair shaft and lasts until new hair growth occurs, semipermanent hair color only coats the outside of the hair shaft. This type of hair color gradually fades with each wash, allowing for a temporary change in hair color without a long-lasting commitment. Aniline derivative tints, temporary rinses, and metallic dyes are not specifically designed to last for a limited number of shampoos, making semipermanent the correct answer.

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  • Mar 15, 2012
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