Skin Structure, Growth And Nutrition: Quiz!

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Skin Structure, Growth And Nutrition: Quiz! - Quiz

Ready to learn some cool stuff about your skin? Take our Skin Structure, Growth And Nutrition Quiz and discover fascinating facts about your body's largest organ. From understanding how your skin grows to learning how nutrition impacts its health, this quiz will give you valuable insights into skincare and overall wellness.

Our Skin Structure, Growth And Nutrition Quiz is designed to help you understand the intricate details of your skin's biology. From the outermost layer to the deepest layers, you'll explore the structure of your skin and how it grows and regenerates over time. Additionally, you'll learn about the essential Read morerole that nutrition plays in maintaining healthy skin, from the foods that promote collagen production to those that protect against UV damage. So let's get started!


Skin Structure, Growth and Nutrition Questions and Answers

  • 1. 

    People with dark-colored skin mostly produce ____________.

    • A.

      Primary melanin

    • B.

      Pheomelanin

    • C.

      Eumelanin

    • D.

      Secondary melanin

    Correct Answer
    C. Eumelanin
    Explanation
    People with dark-colored skin mostly produce eumelanin. Eumelanin is a type of melanin that is responsible for the brown to black pigmentation in the skin, hair, and eyes. It provides protection against the harmful effects of UV radiation from the sun. Darker-skinned individuals have higher levels of eumelanin, which helps to absorb and scatter UV radiation, reducing the risk of sunburn and skin damage.

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  • 2. 

    What is the medical branch of science that deals with the study of skin?

    • A.

      Neurology

    • B.

      Osteology

    • C.

      Dermatology

    • D.

      Cardiology 

    Correct Answer
    C. Dermatology
    Explanation
    Dermatology is the correct answer because it is the medical branch of science that focuses on the study, diagnosis, and treatment of the skin, hair, and nails. Dermatologists specialize in identifying and treating various skin conditions, such as acne, eczema, psoriasis, and skin cancer. They also perform cosmetic procedures, including Botox injections, chemical peels, and laser treatments.

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  • 3. 

    Impulses are carried from the brain to the muscle by ___________ nerve fibers.

    • A.

      Motor 

    • B.

      Secretory

    • C.

      Passive

    • D.

      Sensory

    Correct Answer
    A. Motor 
    Explanation
    Motor nerve fibers are responsible for carrying impulses from the brain to the muscles. These fibers transmit signals that control muscle movement and coordination. Motor nerves are part of the peripheral nervous system and are essential for voluntary movements and reflexes. They allow the brain to communicate with the muscles, enabling us to perform various physical activities.

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  • 4. 

    Where are the melanocytes located?

    • A.

      Stratum Lucidum

    • B.

      Stratum Granulosum

    • C.

      Stratum Corneum

    • D.

      Stratum Germinativum

    Correct Answer
    D. Stratum Germinativum
    Explanation
    Melanocytes are located in the stratum germinativum. This layer of the epidermis is also known as the basal layer and is responsible for the production of new skin cells. Melanocytes are specialized cells that produce melanin, the pigment responsible for skin color. They are found in the stratum germinativum and transfer melanin to neighboring skin cells, providing protection against UV radiation from the sun.

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  • 5. 

    Skin color depends on tiny grains of pigment or coloring matter, called ______________.

    • A.

      Collagen

    • B.

      Melanin

    • C.

      Papule

    • D.

      Sebum

    Correct Answer
    B. Melanin
    Explanation
    Melanin is the correct answer because it is the pigment responsible for determining skin color. It is produced by specialized cells called melanocytes and gives color to the hair, skin, and eyes. The amount and type of melanin present in the skin determine the different shades of skin color, ranging from light to dark.

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  • 6. 

    The outermost layer of the skin is the __________________.

    • A.

      Reticular

    • B.

      Epidermis

    • C.

      Dermis

    • D.

      Papillary 

    Correct Answer
    B. Epidermis
    Explanation
    The correct answer is Epidermis. The epidermis is the outermost layer of the skin. It is composed of multiple layers of cells and serves as a protective barrier against environmental factors such as bacteria, UV radiation, and chemicals. The epidermis also helps regulate body temperature and prevents excessive water loss.

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  • 7. 

    The specialist who provides cleansing treatments for the skin is a(n) _____________.

    • A.

      Esthetician

    • B.

      Pedicurist

    • C.

      Dermatologist

    • D.

      Manicurist 

    Correct Answer
    A. Esthetician
    Explanation
    An esthetician is a specialist who provides cleansing treatments for the skin. They are trained in various techniques to improve the appearance and health of the skin, such as facials, exfoliation, and extractions. Estheticians also provide advice on skincare products and routines. Pedicurists focus on foot and nail care, while dermatologists are medical doctors who diagnose and treat skin conditions. Manicurists specialize in nail care. Therefore, the correct answer is esthetician.

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  • 8. 

    What is NOT one of the principal functions of the skin?

    • A.

      Sensation

    • B.

      Heat Regulation

    • C.

      Excretion

    • D.

      Digestion

    Correct Answer
    D. Digestion
    Explanation
    The skin is responsible for various functions, including sensation, heat regulation, and excretion. However, digestion is not one of the principal functions of the skin. Digestion primarily occurs in the gastrointestinal tract, where food is broken down and nutrients are absorbed. The skin's main role is to protect the body from external threats and regulate body temperature, not to assist in the digestion process.

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  • 9. 

    The body needs ___________ for many body functions, including hormones & sebum production.

    • A.

      Fats

    • B.

      Carbohydrates

    • C.

      Minerals

    • D.

      Proteins

    Correct Answer
    A. Fats
    Explanation
    The body needs fats for many body functions, including hormone production and sebum production. Fats are an essential nutrient that provides energy, helps in the absorption of fat-soluble vitamins, and supports cell growth. They also play a crucial role in maintaining healthy skin and hair. Without an adequate intake of fats, the body may experience hormonal imbalances and dryness of the skin. Therefore, fats are necessary for various bodily functions and should be included in a balanced diet.

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  • 10. 

    Continued, repeated pressure on any part of the skin can cause it to thicken and develop into a ___________________.

    • A.

      Comedo

    • B.

      Papule

    • C.

      Callus

    • D.

      Pustule

    Correct Answer
    C. Callus
    Explanation
    Continued, repeated pressure on any part of the skin can cause it to thicken and develop into a callus. A callus is a toughened area of skin that forms as a protective response to friction or pressure. It usually occurs on the hands or feet, where repetitive activities or ill-fitting shoes can cause constant rubbing or pressure. The thickening of the skin in the form of a callus helps to prevent further damage and provides a cushioning effect.

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  • 11. 

    What are the two layers of the dermis?

    • A.

      Reticular & tactile

    • B.

      Papillary & Subcutaneous

    • C.

      Papillary & Reticular

    • D.

      Reticular & Subcutaneous

    Correct Answer
    C. Papillary & Reticular
    Explanation
    The dermis is the second layer of the skin, located beneath the epidermis. It is composed of two main layers: the papillary layer and the reticular layer. The papillary layer is the uppermost layer of the dermis and contains papillae, which are small finger-like projections that interlock with the epidermis. The reticular layer is the deeper and thicker layer of the dermis, composed of dense connective tissue that provides strength and elasticity to the skin. Therefore, the correct answer is Papillary & Reticular.

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  • 12. 

    What is the principal component of hair & nails?

    • A.

      Elastin

    • B.

      Melanin

    • C.

      Keratin

    • D.

      Collagen

    Correct Answer
    C. Keratin
    Explanation
    Keratin is the principal component of hair and nails. Keratin is a tough, fibrous protein that provides strength and structure to these structures. It is responsible for the hardness and durability of hair and nails. Melanin, on the other hand, is responsible for the color of hair and skin. Elastin is a protein that provides elasticity to tissues, while collagen is a structural protein found in connective tissues. However, neither elastin nor collagen is the principal component of hair and nails.

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  • 13. 

    What is the oily secretion that lubricates the skin & preserves the softness of the hair?

    • A.

      Elastin

    • B.

      Collagen

    • C.

      Perspiration

    • D.

      Sebum

    Correct Answer
    D. Sebum
    Explanation
    Sebum is the oily secretion produced by the sebaceous glands in the skin. It acts as a natural moisturizer, lubricating the skin and hair. Sebum helps to keep the skin hydrated, soft, and supple, while also protecting it from environmental factors. It plays a crucial role in maintaining the health and integrity of both the skin and hair.

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  • 14. 

    If the skin of an average adult were stretched out, it would cover more than how many square inches?

    • A.

      1,500

    • B.

      3,000

    • C.

      2,000

    • D.

      5,000

    Correct Answer
    B. 3,000
    Explanation
    The skin of an average adult covers a large surface area. It is estimated that the skin of an average adult, when stretched out, would cover more than 3,000 square inches. This is because the skin covers the entire body, including the arms, legs, torso, and head. The skin is the largest organ of the body and provides protection against external factors.

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  • 15. 

    The horny layer or outer covering of the epidermis, is the _____________.

    • A.

      Stratum corneum

    • B.

      Stratum Granulosum    

    • C.

      Stratum Germinativum

    • D.

      Stratum Spinosum

    Correct Answer
    A. Stratum corneum
    Explanation
    The correct answer is Stratum corneum. The stratum corneum is the outermost layer of the epidermis, also known as the horny layer. It is composed of dead skin cells called corneocytes that are tightly packed together. This layer acts as a protective barrier against external factors such as bacteria, chemicals, and UV radiation. It also helps to prevent water loss from the body and maintains skin hydration.

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  • 16. 

    The clear fluid that bathes skin cells, removes toxins & cellular waste, and has immune functions is called __________.

    • A.

      Collagen

    • B.

      Lymph

    • C.

      Blood

    • D.

      Adipose

    Correct Answer
    B. Lymph
    Explanation
    Lymph is the clear fluid that bathes skin cells, removes toxins and cellular waste, and has immune functions. It is a part of the lymphatic system, which plays a crucial role in maintaining the body's fluid balance and immune defense. Lymph carries white blood cells, proteins, and other substances that help fight infections and remove waste products from the tissues. It circulates throughout the body via lymphatic vessels and lymph nodes, filtering and cleansing the fluid before returning it to the bloodstream.

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  • 17. 

    The small, cone-shaped elevations at the bottom of hair follicles are called the _____________.

    • A.

      Melanocytes

    • B.

      Sebaceous Glands

    • C.

      Tactile Corpuscles

    • D.

      Dermal Papillae

    Correct Answer
    D. Dermal Papillae
    Explanation
    Sensory nerve fibers are responsible for detecting and transmitting information about heat, cold, touch, pressure, and pain. These fibers are found throughout the body and are connected to sensory receptors in the skin, muscles, and organs. When these receptors are stimulated by external stimuli or internal changes, the sensory nerve fibers send signals to the brain, allowing us to perceive and respond to different sensory sensations.

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  • 18. 

    The fibrous protein that gives skin form & strength is ____________. 

    • A.

      Keratin

    • B.

      Elastin

    • C.

      Pheomelanin

    • D.

      Collagen

    Correct Answer
    D. Collagen
    Explanation
    Collagen is a fibrous protein that provides structure and strength to the skin. It is the main component of the connective tissues in the body, including the skin, tendons, ligaments, and bones. Collagen helps maintain the elasticity and firmness of the skin, preventing sagging and wrinkles. It also plays a crucial role in wound healing and tissue repair. Elastin is another protein that contributes to the elasticity of the skin, but collagen is primarily responsible for its form and strength. Keratin is a protein found in the skin, hair, and nails, while pheomelanin is a pigment responsible for red and yellow hair and skin tones.

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  • 19. 

    Which vitamin is vital in fighting the aging process & promoting the production of collagen?

    • A.

      Vitamin A

    • B.

      Vitamin D

    • C.

      Vitamin C

    • D.

      Vitamin E

    Correct Answer
    C. Vitamin C
    Explanation
    Vitamin C is vital in fighting the aging process and promoting the production of collagen. Collagen is a protein that helps maintain the structure and elasticity of the skin. Vitamin C is essential for the synthesis of collagen, which is important for the health and appearance of the skin. It also has antioxidant properties that help protect the skin from damage caused by free radicals, which can contribute to aging. Therefore, consuming enough Vitamin C through diet or supplements can help support healthy skin and combat the signs of aging.

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  • 20. 

    Which layer of the epidermis is also known as the basal cell layer?

    • A.

      Stratum Corneum

    • B.

      Stratum Spinosum

    • C.

      Stratum Germinativum

    • D.

      Stratum Granulosum

    Correct Answer
    C. Stratum Germinativum
    Explanation
    The correct answer is Stratum Germinativum. This layer of the epidermis is also known as the basal cell layer because it is the deepest layer where new skin cells are constantly being produced. It is responsible for the regeneration and renewal of the epidermis.

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  • 21. 

    Which nerve fibers react to heat, cold, touch, pressure & pain?

    • A.

      Sensory

    • B.

      Secretory

    • C.

      Passive

    • D.

      Motor

    Correct Answer
    A. Sensory
    Explanation
    Sensory nerve fibers are responsible for detecting and transmitting information about heat, cold, touch, pressure, and pain. These fibers are found throughout the body and are connected to sensory receptors in the skin, muscles, and organs. When these receptors are stimulated by external stimuli or internal changes, the sensory nerve fibers send signals to the brain, allowing us to perceive and respond to different sensory sensations.

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  • 22. 

    The pigment produced to protect the skin from the effects of ultraviolet sun rays is called _________________.

    • A.

      Elastin

    • B.

      Collagen

    • C.

      Keratin

    • D.

      Melanin

    Correct Answer
    D. Melanin
    Explanation
    Melanin is the pigment produced by cells called melanocytes in the skin. It acts as a natural sunscreen, protecting the skin from the harmful effects of ultraviolet (UV) rays from the sun. Melanin absorbs the UV radiation and helps to prevent damage to the DNA in skin cells, which can lead to sunburn, premature aging, and an increased risk of skin cancer. The more melanin a person has, the darker their skin tone. Therefore, melanin plays a crucial role in protecting the skin from the effects of UV rays.

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  • 23. 

    The surface of healthy skin should ____________.

    • A.

      Be slightly acidic

    • B.

      Have a neutral pH

    • C.

      Be slightly alkaline

    • D.

      Be highly acidic

    Correct Answer
    A. Be slightly acidic
    Explanation
    The surface of healthy skin should be slightly acidic. This is because the slightly acidic pH helps to maintain the skin's natural barrier function, which protects against harmful bacteria and other pathogens. Additionally, the acidic pH helps to keep the skin moisturized and balanced, preventing dryness and irritation. If the skin's pH becomes too alkaline or highly acidic, it can disrupt the natural balance and lead to various skin issues such as acne, dryness, and inflammation.

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  • 24. 

    Subcutaneous tissue does all of the following EXCEPT what?

    • A.

      Gives smoothness & contour to the body

    • B.

      Contains fats for use as energy

    • C.

      Produces melanin

    • D.

      Acts as a protective cushion for the skin

    Correct Answer
    C. Produces melanin
    Explanation
    The subcutaneous tissue is responsible for giving smoothness and contour to the body, containing fats for energy, and acting as a protective cushion for the skin. However, it does not produce melanin. Melanin is produced by cells called melanocytes in the epidermis, the outermost layer of the skin. Melanin is responsible for giving color to the skin, hair, and eyes.

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  • 25. 

    What is NOT a characteristic of healthy skin?

    • A.

      Slightly moist

    • B.

      Fine-grained texture

    • C.

      Rigid

    • D.

      Soft

    Correct Answer
    C. Rigid
    Explanation
    Rigid is not a characteristic of healthy skin because healthy skin should have some elasticity and flexibility. Rigid skin can indicate dehydration or a lack of moisture, which can lead to dryness, flakiness, and discomfort. Healthy skin should be slightly moist, have a fine-grained texture, and feel soft to the touch.

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  • 26. 

    The protein base that helps skin regain its shape after being stretched or expanded is called _____________.

    • A.

      Elastin

    • B.

      Collagen

    • C.

      Melanin

    • D.

      Keratin

    Correct Answer
    A. Elastin
    Explanation
    Elastin is the protein base that helps skin regain its shape after being stretched or expanded. It is a highly elastic protein found in connective tissues, such as the skin, that allows it to stretch and recoil. Collagen, on the other hand, provides structural support and strength to the skin, but it does not possess the same elasticity as elastin. Melanin is responsible for skin pigmentation, while keratin is a protein found in the outermost layer of the skin, hair, and nails.

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  • 27. 

    The clear, transparent skin layer just under the surface through which light passes is the _____________.

    • A.

      Stratum Germinativum

    • B.

      Stratum Lucidum

    • C.

      Stratum Granulosum

    • D.

      Stratum Corneum

    Correct Answer
    B. Stratum Lucidum
    Explanation
    The correct answer is Stratum Lucidum. The stratum lucidum is a clear, transparent layer of skin found just under the surface. It is composed of dead skin cells that lack nuclei and other organelles, making it translucent. This layer is most commonly found in the palms of the hands and soles of the feet, where the skin is thicker and requires additional protection. The stratum lucidum allows light to pass through it, contributing to the overall transparency of the skin in these areas.

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  • 28. 

    Which vitamin helps protect the skin from the harmful effects of the sun's UV light?

    • A.

      Vitamin C

    • B.

      Vitamin E

    • C.

      Vitamin D

    • D.

      Vitamin A

    Correct Answer
    B. Vitamin E
    Explanation
    Vitamin E is known for its antioxidant properties, which help protect the skin from damage caused by free radicals generated by UV light exposure. UV light can cause oxidative stress in the skin, leading to premature aging, sunburn, and an increased risk of skin cancer. Vitamin E acts as a shield, neutralizing these free radicals and reducing the harmful effects of UV light on the skin. Therefore, it is essential in maintaining healthy and protected skin in the face of sun exposure.

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  • 29. 

    Nutrients & Oxygen are supplied to the skin by ______________.

    • A.

      Lymph

    • B.

      Papules

    • C.

      Blood 

    • D.

      Pustules

    Correct Answer
    C. Blood 
    Explanation
    The correct answer is Blood. Blood carries nutrients and oxygen to all parts of the body, including the skin. It is transported through blood vessels, which reach the skin and supply it with the necessary substances for its proper functioning and health.

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  • 30. 

    Which of the following is NOT found in the reticular layer?

    • A.

      Lymph vessels

    • B.

      Oil glands

    • C.

      Nerve endings

    • D.

      Melanocytes

    Correct Answer
    D. Melanocytes
    Explanation
    Melanocytes are not found in the reticular layer. The reticular layer is the deepest layer of the dermis and is composed of dense irregular connective tissue. It contains various structures such as blood vessels, lymph vessels, nerve endings, and oil glands. Melanocytes, which are responsible for producing melanin, are primarily found in the basal layer of the epidermis, not in the reticular layer.

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  • 31. 

    A(n) ______ is a raised, inflamed papule with a white or yellow center containing pus.

    • A.

      Pimple

    • B.

      Closed comedo

    • C.

      Pustule

    • D.

      Open comedo

    Correct Answer
    C. Pustule
    Explanation
    A pustule is a raised, inflamed papule with a white or yellow center containing pus. Pustules are commonly seen in conditions such as acne and are formed when the hair follicles become blocked with dead skin cells, oil, and bacteria. The accumulation of these substances leads to inflammation and the formation of a pustule.

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  • 32. 

    Continued, repeated pressure on any part of the skin can cause it to thicken & develop into a ___________.

    • A.

      Comedo

    • B.

      Papule

    • C.

      Callus

    • D.

      Pustule

    Correct Answer
    C. Callus
    Explanation
    Continued, repeated pressure on any part of the skin can cause it to thicken and develop into a callus. A callus is a toughened area of skin that forms in response to friction or pressure. It is a protective response of the skin to prevent further damage.

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  • 33. 

    Normally, how many pints of salt-containing liquids are eliminated daily through sweat pores in the skin?

    • A.

      1 to 2

    • B.

      2 to 3

    • C.

      3 to 4

    • D.

      More than 5

    Correct Answer
    A. 1 to 2
    Explanation
    On average, the human body eliminates 1 to 2 pints of salt-containing liquids daily through sweat pores in the skin. This process helps regulate body temperature and maintain electrolyte balance. Sweat is primarily composed of water and contains small amounts of salt, urea, and other minerals. The amount of sweat produced can vary depending on factors such as physical activity, temperature, and individual differences.

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  • 34. 

    On which body part are sudoriferous more numerous?

    • A.

      Back of the hands

    • B.

      Forehead

    • C.

      Neck

    • D.

      Ankles

    Correct Answer
    B. Forehead
    Explanation
    Sudoriferous glands, also known as sweat glands, are more numerous on the forehead compared to other body parts. These glands are responsible for producing sweat, which helps regulate body temperature. The forehead has a higher concentration of sweat glands because it is an area where heat is easily generated and needs to be dissipated. Sweat glands on the forehead are particularly active during physical activity or when the body is exposed to high temperatures, helping to cool down the body.

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  • 35. 

    A majority of scientists now believe that most signs of skin aging are caused by _______________.

    • A.

      Sun exposure

    • B.

      Smoking

    • C.

      Chronic illness

    • D.

      Poor diet

    Correct Answer
    A. Sun exposure
    Explanation
    Sun exposure is the correct answer because it is widely accepted among scientists that the majority of signs of skin aging, such as wrinkles, age spots, and loss of elasticity, are primarily caused by prolonged exposure to the sun's ultraviolet (UV) rays. The UV rays can damage the skin's collagen and elastin fibers, leading to premature aging. This is supported by numerous studies and research showing the harmful effects of sun exposure on the skin and the importance of sun protection in preventing skin aging.

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  • 36. 

    The red to yellow melanin produced by the body is _________________.

    • A.

      Eumelanin

    • B.

      Primary melanin

    • C.

      Pheomelanin

    • D.

      Secondary melanin

    Correct Answer
    C. Pheomelanin
    Explanation
    Pheomelanin is the correct answer because it is the type of melanin produced by the body that ranges in color from red to yellow. It is responsible for determining the lighter shades of hair, skin, and eye colors. Eumelanin, on the other hand, is responsible for darker shades of hair, skin, and eye colors. Primary and secondary melanin are not recognized terms in the context of melanin production.

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  • 37. 

    The nerve fibers that regulate the excretion of perspiration are the __________ nerve fibers. 

    • A.

      Motor

    • B.

      Secretory

    • C.

      Sensory

    • D.

      Passive

    Correct Answer
    B. Secretory
    Explanation
    The correct answer is "Secretory" because sweat glands are responsible for the production and excretion of perspiration. These glands are innervated by secretory nerve fibers, which stimulate the release of sweat. Motor nerve fibers control muscle movement, sensory nerve fibers transmit sensory information, and passive is not a category of nerve fibers.

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  • 38. 

    The layer of the skin commonly called the true skin is the _____________.

    • A.

      Epidermis

    • B.

      Stratum germinativum

    • C.

      Dermis

    • D.

      Stratum granulosum

    Correct Answer
    C. Dermis
    Explanation
    The correct answer is Dermis. The dermis is the layer of skin beneath the epidermis. It is composed of connective tissue and contains blood vessels, nerves, sweat glands, hair follicles, and sebaceous glands. The dermis provides support and nourishment to the epidermis and is responsible for the skin's elasticity and strength. It also contains collagen and elastin fibers, which give the skin its structure and allow it to stretch and recoil.

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  • 39. 

    The muscles that can cause goose bumps are called the ________ muscles.

    • A.

      Papillary

    • B.

      Excretory

    • C.

      Sensory

    • D.

      Arrector pili

    Correct Answer
    D. Arrector pili
    Explanation
    The muscles that cause goose bumps are known as arrector pili muscles. These tiny muscles are connected to hair follicles and contract in response to cold, fear, or other stimuli. When they contract, they pull on the hair follicles, causing the hairs to stand up and creating the appearance of goose bumps on the skin.

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  • 40. 

    The deepest layer of the dermis that supplies oxygen & nutrients to the skin is the ______________.

    • A.

      Papillary layer

    • B.

      Subcutaneous layer

    • C.

      Reticular layer

    • D.

      Stratum germinativum

    Correct Answer
    C. Reticular layer
    Explanation
    The reticular layer is the correct answer because it is the deepest layer of the dermis and contains blood vessels that supply oxygen and nutrients to the skin. This layer also houses collagen and elastin fibers, which provide strength and elasticity to the skin. The papillary layer is the superficial layer of the dermis and is responsible for forming fingerprints. The subcutaneous layer is not part of the dermis but lies beneath it and is composed of fat tissue. The stratum germinativum is the deepest layer of the epidermis, not the dermis.

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  • 41. 

    The epidermal-dermal junction is located at the top of the ______________ layer.

    • A.

      Papillary

    • B.

      Stratum spinosum

    • C.

      Reticular

    • D.

      Stratum lucidum

    Correct Answer
    A. Papillary
    Explanation
    The epidermal-dermal junction is located at the top of the papillary layer. This layer is found in the dermis and is characterized by its finger-like projections called dermal papillae. These papillae interlock with the epidermis, forming the epidermal-dermal junction. The papillary layer is responsible for providing nutrients to the epidermis and plays a crucial role in the exchange of gases and waste products between the two layers.

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  • 42. 

    When sebum hardens & completely clogs an oil duct so that there are no surface follicle openings, it creates a(n) _________________.

    • A.

      Callus

    • B.

      Closed comedo

    • C.

      Melanocyte

    • D.

      Open comedo

    Correct Answer
    D. Open comedo
    Explanation
    When sebum hardens and completely clogs an oil duct, it creates an open comedo. An open comedo, also known as a blackhead, occurs when the clogged pore remains open and the sebum oxidizes, causing it to turn black. This differs from a closed comedo, or whitehead, where the pore is completely blocked and the sebum is not exposed to the air. A callus is a thickened and hardened area of skin, while a melanocyte is a type of cell that produces melanin, the pigment responsible for skin color.

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  • 43. 

    The sudoriferous glands:

    • A.

      Detoxify the body

    • B.

      Are found primarily on the scalp

    • C.

      Excrete sebum

    • D.

      Are also known as oil glands

    Correct Answer
    A. Detoxify the body
    Explanation
    The sudoriferous glands, also known as sweat glands, play a vital role in the body's detoxification process. When the body temperature rises due to physical activity, hot weather, or stress, these glands produce sweat, which is mostly composed of water along with small amounts of salts and other compounds. As sweat evaporates from the skin's surface, it helps cool down the body.

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  • 44. 

    Which skin disorder is characterized by chronic inflammation of the sebaceous glands from retained secretions?

    • A.

      Nevus

    • B.

      Psoriasis

    • C.

      Acne

    • D.

      Rosacea

    Correct Answer
    C. Acne
    Explanation
    Sensory nerve fibers are responsible for detecting and transmitting information about heat, cold, touch, pressure, and pain. These fibers are found throughout the body and are connected to sensory receptors in the skin, muscles, and organs. When these receptors are stimulated by external stimuli or internal changes, the sensory nerve fibers send signals to the brain, allowing us to perceive and respond to different sensory sensations.

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  • 45. 

    Nerve endings that are sensitive to touch & pressure are found in which layer of the skin?

    • A.

      Reticular layer

    • B.

      Stratum corneum

    • C.

      Papillary layer

    • D.

      Stratum lucidum

    Correct Answer
    C. Papillary layer
    Explanation
    The nerve endings that are sensitive to touch and pressure are found in the papillary layer of the skin. This layer is located just beneath the epidermis and is responsible for providing the skin with its sensitivity. It contains numerous small blood vessels and nerve endings, making it highly sensitive to touch and pressure stimuli. The other options, such as the reticular layer, stratum corneum, and stratum lucidum, do not contain as many nerve endings and are not primarily responsible for the sense of touch and pressure.

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  • 46. 

    The National Institute of Health (NIH) recommends a diet that is low in __________________.

    • A.

      Salt

    • B.

      Water

    • C.

      Saturated fat

    • D.

      Grains

    Correct Answer
    C. Saturated fat
    Explanation
    The National Institute of Health (NIH) recommends a diet that is low in saturated fat because consuming high amounts of saturated fat can increase the risk of developing heart disease and other health problems. Saturated fat is commonly found in animal products such as meat, butter, and full-fat dairy products. By reducing the intake of saturated fat, individuals can lower their cholesterol levels and maintain a healthier heart.

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Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Feb 26, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • May 30, 2020
    Quiz Created by
    Angelicahurtado5
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