Histology Of Skin And Hair

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  • 1/52 Questions

    The  microscopic study of the skin is called : 

    • Histology
    • Endocrinology
    • Dermatology
    • Trichology
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About This Quiz

Explore the microscopic anatomy of skin and hair in this focused quiz. Assess key knowledge areas such as histology, skin layers, and the pilosebaceous unit. Ideal for students and professionals aiming to deepen their understanding of human biology.

Histology Of Skin And Hair - Quiz

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  • 2. 

    " Full anagen" or "Late anagen" or " advanced anagen " or " anagen 6 or VI or " deepest anagen" indicates: 

    • Shallow telogen

    • Lanugo hair

    • Accelerated vellus hair

    • Deepest follicule stage

    Correct Answer
    A. Deepest follicule stage
    Explanation
    The term "Full anagen" or "Late anagen" or "advanced anagen" or "anagen 6 or VI" or "deepest anagen" refers to the deepest stage of the hair follicle. This stage is characterized by active hair growth, with the hair follicle being fully engaged in producing a hair shaft. It is the stage where the hair is at its strongest and healthiest, and it is during this stage that the hair grows the longest.

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  • 3. 

    Skin and its appendages receive nourishment from :

    • The excretory system

    • The endocrine system

    • The blood vascular system

    • The nervous system

    Correct Answer
    A. The blood vascular system
    Explanation
    The skin and its appendages receive nourishment from the blood vascular system. The blood vessels in the skin deliver oxygen and nutrients to the cells, while also removing waste products. This ensures that the skin remains healthy and can carry out its functions effectively. The excretory system is responsible for eliminating waste from the body, the endocrine system regulates hormones, and the nervous system controls sensory and motor functions, but they do not directly provide nourishment to the skin.

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  • 4. 

    What is the prickle cell layer of the skin? 

    • Lucidum

    • Corneum

    • Spinosum

    • Granulosum

    Correct Answer
    A. Spinosum
    Explanation
    The prickle cell layer of the skin is also known as the stratum spinosum. It is the layer of the epidermis that is located just above the basal cell layer. The cells in this layer have a spiny appearance due to the presence of desmosomes, which are protein structures that connect adjacent cells together. The stratum spinosum is responsible for providing strength and support to the skin, as well as playing a role in the immune response.

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  • 5. 

    Which of the following id not part of the pilosebaceous unit?

    • Sudoriferous gland

    • Dermal papilla

    • Sabaceous gland

    • Arrector pili muscle

    Correct Answer
    A. Sudoriferous gland
    Explanation
    The pilosebaceous unit is composed of the sebaceous gland, dermal papilla, and arrector pili muscle. The sebaceous gland produces sebum, the dermal papilla nourishes the hair follicle, and the arrector pili muscle contracts to make the hair stand up. The sudoriferous gland, also known as the sweat gland, is not part of the pilosebaceous unit as it is responsible for producing sweat, not sebum.

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  • 6. 

    In which layer of the skin is eleidin found? 

    • Epidermis : Stratum Lucidum

    • Epidermis: Stratum Germinativum

    • Dermis:Papillary Layer

    • Epidermis : Stratum Corneum

    Correct Answer
    A. Epidermis : Stratum Lucidum
    Explanation
    Eleidin is found in the epidermis, specifically in the stratum lucidum layer.

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  • 7. 

    The arrector pili is : 

    • An involuntary muscle

    • A static muscle

    • A voluntary muscle

    • A strong Muscle

    Correct Answer
    A. An involuntary muscle
    Explanation
    The arrector pili is an involuntary muscle that is responsible for causing goosebumps or making the hair on our body stand up. This muscle is connected to the hair follicles and contracts involuntarily in response to various stimuli such as cold temperature or emotional arousal. It is not under conscious control, hence it is considered an involuntary muscle.

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  • 8. 

    Which  of the following statements about the sebaceous glands is true ? 

    • They control the body temperature

    • They are always associated with hair follicles

    • They are abundant on the face only

    • They are a source of new hairs

    Correct Answer
    A. They are a source of new hairs
  • 9. 

    The visible portion of a hair is called :

    • Shaft

    • Shank

    • Root

    • A&B

    Correct Answer
    A. Shaft
    Explanation
    The visible portion of a hair is called the shaft. The shaft is the part of the hair that extends above the surface of the skin. It is composed of dead cells and is responsible for giving hair its length and color. The shaft is the part of the hair that we see and style, while the root is the part that is located beneath the surface of the skin and anchors the hair in place. The options "Shank" and "A&B" are incorrect as they do not accurately describe the visible portion of a hair.

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  • 10. 

    Hair cells in the cortex layer are :

    • Flattened

    • Elongated

    • Round

    • Polyhedral

    Correct Answer
    A. Elongated
    Explanation
    Hair cells in the cortex layer are elongated. This means that they have a long and narrow shape. This shape allows them to have a larger surface area for sensory reception and transmission of signals. The elongated shape also enables them to be more flexible and responsive to stimuli.

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  • 11. 

    The follicule of terminal hair is found to be of greatest depth in : 

    • Early stage of telogen

    • Early stage of anagen

    • Advanced stage of telogen

    • Advanced stage of anagen

    Correct Answer
    A. Advanced stage of anagen
    Explanation
    In the advanced stage of anagen, the hair follicle is at its deepest point of growth. This is when the hair is actively growing and the follicle is fully engaged in producing new hair cells. In the early stage of anagen, the hair follicle is still in the process of transitioning into the growth phase and has not reached its maximum depth yet. Therefore, the advanced stage of anagen is the correct answer as it represents the period of greatest depth in the follicle of terminal hair.

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  • 12. 

    In what type of skin are melanocytes larger and more active ?

    • Light skin

    • Fair Skin

    • Dark skin

    • None of the above

    Correct Answer
    A. Dark skin
    Explanation
    Melanocytes are cells that produce melanin, the pigment responsible for skin color. In dark skin, melanocytes are larger and more active compared to light or fair skin. This is because dark skin contains more melanin, which provides greater protection against harmful UV radiation from the sun. The higher activity of melanocytes in dark skin helps to absorb and disperse UV radiation, reducing the risk of sunburn and skin damage.

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  • 13. 

    The  blood and nerve supply of hair follicule is found in the : 

    • Cuticle

    • Cortex

    • Papilla

    • Bulb

    Correct Answer
    A. Papilla
    Explanation
    The blood and nerve supply of the hair follicle is found in the papilla. The papilla is a small, conical structure at the base of the hair follicle that contains blood vessels and nerves. It provides the necessary nutrients and oxygen to the hair follicle, which is essential for hair growth and maintenance. Additionally, the papilla plays a role in regulating the hair growth cycle and the production of new hair cells.

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  • 14. 

    What is the outermost layer of the skin?

    • Dermis

    • Epidermis

    • Sub-cutaneous

    • Basal

    Correct Answer
    A. Epidermis
    Explanation
    The outermost layer of the skin is called the epidermis. It is the topmost layer of the skin and acts as a protective barrier against external factors such as bacteria, UV radiation, and chemicals. The epidermis is made up of several layers of cells, including the basal layer, which is responsible for the production of new skin cells. This layer also contains melanocytes, which produce melanin, the pigment responsible for skin color. Overall, the epidermis plays a crucial role in maintaining the integrity and health of the skin.

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  • 15. 

    The  layer of  the epidermis which produces melanin is called : 

    • Basal layer

    • Spiny layer

    • Prickle layer

    • Horny layer

    Correct Answer
    A. Basal layer
    Explanation
    The correct answer is Basal layer. The basal layer is the deepest layer of the epidermis and is responsible for producing melanin, the pigment that gives color to the skin, hair, and eyes. Melanin protects the skin from the harmful effects of the sun's ultraviolet (UV) rays.

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  • 16. 

    The fibrous portion of the dermis contains all exept:

    • Collagen

    • Elastic fibers

    • Reticulum

    • Mast cells

    Correct Answer
    A. Mast cells
    Explanation
    The fibrous portion of the dermis is primarily composed of collagen, elastic fibers, and reticulum. Collagen provides strength and support to the skin, while elastic fibers allow the skin to stretch and recoil. Reticulum helps in connecting the collagen and elastic fibers. Mast cells, on the other hand, are not a part of the fibrous portion of the dermis. They are a type of immune cell that plays a role in allergic reactions and inflammation.

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  • 17. 

    Collagen makes the skin more 

    • Elastic

    • Hard

    • Oily

    • Dry

    Correct Answer
    A. Elastic
    Explanation
    Collagen is a protein that is naturally present in the skin. It plays a crucial role in maintaining the skin's strength and elasticity. As we age, the production of collagen decreases, leading to the loss of elasticity in the skin. Therefore, the correct answer is "Elastic," as collagen helps to make the skin more supple and resilient.

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  • 18. 

    Other names for the dermis are cutis , derma, curium and : 

    • Epidermis

    • Lucid up skin

    • True skin

    • Granular layer

    Correct Answer
    A. True skin
    Explanation
    The dermis is the layer of skin that lies beneath the epidermis. It is responsible for providing strength and elasticity to the skin. Other names for the dermis include cutis, derma, and curium. Therefore, the correct answer is "True skin."

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  • 19. 

    What is the name for the system that composes the skin and its appendages ? 

    • Central nervous

    • Integumentary

    • Vascular

    • Respiratory

    Correct Answer
    A. Integumentary
    Explanation
    The correct answer is Integumentary. The integumentary system is the name for the system that composes the skin and its appendages. This system includes the skin, hair, nails, and glands. It serves as a protective barrier for the body, regulates body temperature, and helps with sensory perception. The central nervous system is responsible for transmitting signals throughout the body, the vascular system is responsible for transporting blood and nutrients, and the respiratory system is responsible for breathing and gas exchange.

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  • 20. 

    The dermis is made up of two layers :

    • Adipose tissue and basal layer

    • Papillary layer and horny layer

    • Papillary and reticular layers

    • Inner layer and granular layer

    Correct Answer
    A. Papillary and reticular layers
    Explanation
    The dermis, which is the second layer of the skin, is composed of two sublayers called the papillary layer and the reticular layer. The papillary layer is the uppermost layer of the dermis and is responsible for nourishing the epidermis. It contains small blood vessels and nerve endings. The reticular layer is the deeper layer of the dermis and is composed of dense connective tissue, providing strength and elasticity to the skin. Together, these two layers make up the dermis, providing support and structure to the skin.

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  • 21. 

    What statement can be made regarding hair follicles?

    • Males have more follicles than women

    • Females have more follicles than men

    • Males and females have the same number of follicles.

    • Children have more follicles than adult

    Correct Answer
    A. Males and females have the same number of follicles.
    Explanation
    The statement that can be made regarding hair follicles is that males and females have the same number of follicles. This means that both genders have an equal amount of hair follicles on their bodies.

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  • 22. 

    Sensory nerves in the skin react to:

    • Skin color

    • Touch

    • Eye color

    • Light

    Correct Answer
    A. Touch
    Explanation
    Sensory nerves in the skin react to touch, allowing us to perceive sensations such as pressure, temperature, and pain. Skin color, eye color, and light do not directly stimulate these nerves. While light can indirectly affect the skin by causing sensations like warmth or sunburn, it is ultimately the touch receptors in the skin that are responsible for detecting and transmitting these sensations to the brain.

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  • 23. 

    Melanin protects the skin from:

    • Pathogenic bacteria

    • Electric heat

    • Steam heat

    • Ultra violet rays

    Correct Answer
    A. Ultra violet rays
    Explanation
    Melanin is a pigment that gives color to the skin, hair, and eyes. It acts as a natural sunscreen by absorbing and scattering the harmful ultraviolet (UV) rays from the sun. UV rays can cause skin damage, sunburn, and increase the risk of skin cancer. Therefore, melanin plays a crucial role in protecting the skin from the damaging effects of UV radiation.

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  • 24. 

    Hair grows out of a depressionn in the :

    • Germinative

    • Dermis

    • Subcutaneous

    • Epidermis

    Correct Answer
    A. Epidermis
    Explanation
    Hair grows out of a depression in the epidermis. The epidermis is the outermost layer of the skin and is responsible for protecting the body from the external environment. Within the epidermis, there are specialized structures called hair follicles, which are invaginations or depressions in the epidermis. These hair follicles contain the cells that produce and nourish the hair shaft, allowing it to grow. Therefore, the correct answer is epidermis.

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  • 25. 

    The main function of sebum is to prevent the skin from :

    • Losing moisture

    • Becoming dirty

    • Losing Color

    • Becoming Blemished

    Correct Answer
    A. Losing moisture
    Explanation
    Sebum, a natural oil produced by the sebaceous glands in the skin, acts as a protective barrier to prevent the skin from losing moisture. It helps to lubricate the skin and maintain its hydration levels, preventing dryness and maintaining its elasticity. By keeping the skin moisturized, sebum also helps to maintain its overall health and prevent issues such as flakiness, irritation, and discomfort.

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  • 26. 

    What are cells that make up most of the live cells of the epidermis in the spinosum layer ?

    • Lysosomes

    • Prickle cells

    • Macrophages

    • Melanocytes

    Correct Answer
    A. Prickle cells
    Explanation
    The correct answer is prickle cells. Prickle cells, also known as squamous cells or squamous keratinocytes, are the main type of cells found in the spinosum layer of the epidermis. These cells are characterized by their spiky appearance due to the presence of desmosomes, which are intercellular junctions that help hold the cells together. Prickle cells play a crucial role in maintaining the integrity and strength of the skin barrier. They also contribute to the formation of the stratum corneum, the outermost layer of the epidermis.

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  • 27. 

    Blood vessels, oil glands, and sweat glands are containes within the:

    • Dermis

    • Epidermis

    • Stratum Corneum

    • Stratum Lucidum

    Correct Answer
    A. Dermis
    Explanation
    The dermis is the correct answer because it is the layer of skin that contains blood vessels, oil glands, and sweat glands. The dermis is located beneath the epidermis and is responsible for providing nutrients to the skin, regulating body temperature, and producing sweat and oil. The epidermis, on the other hand, is the outermost layer of the skin and primarily serves as a protective barrier. The stratum corneum and stratum lucidum are specific layers within the epidermis and do not contain blood vessels, oil glands, or sweat glands.

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  • 28. 

    The percentage of hair growth of anagen stage is dependent on :

    • Shaving

    • Bleaching

    • Location of the Body

    • Age of person

    Correct Answer
    A. Location of the Body
    Explanation
    The percentage of hair growth in the anagen stage is dependent on the location of the body. Hair growth varies in different areas of the body, with some areas growing hair faster than others. Factors such as genetics, hormones, and blood flow can influence the rate of hair growth in different body parts. Therefore, the location of the body plays a significant role in determining the percentage of hair growth during the anagen stage.

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  • 29. 

    The skin layer that gives skin strenght, form, and flexibility is the :

    • Epidermis

    • Lucidum

    • Corneum

    • Dermis

    Correct Answer
    A. Dermis
    Explanation
    The dermis is the skin layer that provides strength, form, and flexibility. It is located beneath the epidermis and contains various structures such as blood vessels, nerves, hair follicles, and sweat glands. The dermis is responsible for supporting the epidermis and giving the skin its elasticity and resilience. It also plays a crucial role in regulating body temperature and providing sensory information to the brain.

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  • 30. 

    What type of hair is associated with or emanates from flat follicule?

    • Flat

    • Very Curly

    • Staight

    • None of the Above

    Correct Answer
    A. Very Curly
    Explanation
    Very curly hair is associated with or emanates from flat follicles. The shape of the hair follicle determines the shape of the hair strand. Flat follicles produce hair strands that are more oval or elliptical in shape, which leads to curly or very curly hair. In contrast, round follicles produce straight hair strands. Therefore, the correct answer is very curly.

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  • 31. 

    Which of the following statements is not true?

    • Sratum granulosum is the fourth sub-layer of the epidermis.

    • Startum germinative is the fifth sub-layer of the epidermis

    • Stratum corneum is the first sub layer of the epidermis

    • Startum lucidum is the second sub layer of the epidermis

    Correct Answer
    A. Sratum granulosum is the fourth sub-layer of the epidermis.
    Explanation
    The correct answer is "sratum granulosum is the fourth sub-layer of the epidermis." This statement is not true because the stratum granulosum is actually the third sub-layer of the epidermis, not the fourth. The correct order of the sub-layers of the epidermis from the deepest to the most superficial is: stratum basale (also known as stratum germinativum), stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.

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  • 32. 

    Which type of hair is hormone dependent,located on face, ear,chest , and abdomen areas?

    • Sexual hair

    • Asexual hair

    • Regular hair

    • All of the above

    Correct Answer
    A. Sexual hair
    Explanation
    Sexual hair is the correct answer because it is hormone dependent and is located on various parts of the body such as the face, ears, chest, and abdomen areas. This type of hair is typically thicker and coarser than regular hair, and its growth is influenced by hormonal changes during puberty and throughout adulthood.

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  • 33. 

    The thickest skin on the human body can be found on the :

    • Eyelids

    • Arms

    • Soles of the feet

    • Forhead

    Correct Answer
    A. Soles of the feet
    Explanation
    The soles of the feet have the thickest skin on the human body. This is because the skin in this area needs to withstand constant pressure and friction from walking and standing. The thick skin on the soles of the feet helps to protect the underlying tissues and bones from damage. Additionally, the skin on the soles of the feet contains an increased number of sweat glands, which helps to keep the feet moisturized and prevent them from drying out.

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  • 34. 

    Which of the following statement is not true ?

    • "catagen Stage" is also known as " transitional stage"

    • "Anagen Stage"is also Known as "growing Stage"

    • "telogen Stage" ia alson Known as "resting stage"

    • "terminal stage" is also known as " shedding stage"

    Correct Answer
    A. "terminal stage" is also known as " shedding stage"
    Explanation
    The statement "terminal stage" is also known as "shedding stage" is not true. The correct term for the final stage of hair growth cycle is "telogen stage", which is also known as the "resting stage". During this stage, the hair follicle is inactive and the old hair is shed to make way for new hair growth.

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  • 35. 

    The hair takes its shape,size and direction from its:

    • Cortex

    • Cuticle

    • Medulla

    • Follicule

    Correct Answer
    A. Follicule
    Explanation
    The follicle is responsible for determining the shape, size, and direction of the hair. It is a small pocket in the skin where the hair grows from. The follicle contains cells that produce keratin, the protein that makes up the hair strand. These cells also determine the shape of the hair, whether it is straight, curly, or wavy. The size of the follicle determines the thickness of the hair strand, with larger follicles producing thicker hair. The direction of the hair is also determined by the follicle, as the hair grows in the direction set by the follicle's shape and orientation.

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  • 36. 

    Name the sub-layers of the epidermis from the inside outward:

    • Corneum,germinative,spinosum,lucidum,and granulosum

    • Basal,Spinosum,granulosum,lucidum, and Corneum

    • Basal,granulosum,corneum,lucidum and spinosum

    • Granulosm,lucidum,mitotic,corneum,and spinosum

    Correct Answer
    A. Basal,Spinosum,granulosum,lucidum, and Corneum
    Explanation
    The sub-layers of the epidermis are named from the inside outward as Basal, Spinosum, Granulosum, Lucidum, and Corneum.

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  • 37. 

    Which of the following statementsis not true ?

    • The cross-sectional view of wavy hair reveals an oval shape

    • The cross-sectional view of straight hair reveals a round shape

    • The cross-sectional view of kinky hair reveals a cylindrical shape

    • The cross-sectional view of curly hair reveals a flat shape

    Correct Answer
    A. The cross-sectional view of kinky hair reveals a cylindrical shape
    Explanation
    The statement "The cross-sectional view of kinky hair reveals a cylindrical shape" is not true. Kinky hair is characterized by tight curls or coils, and its cross-sectional view would reveal a flat shape, not a cylindrical shape.

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  • 38. 

    Name the correct layers of hair follicule frim inside outward:

    • Cuticle,Huxley's, Henleys, and Outer root Sheath

    • Medulla,Glassy layer,Huxley's, Henley's, and Outer root sheath

    • Cortex,Ineer root sheath, Cuticle, and vitreous membrane

    • Connective,Vitreous layer, henley's,and Huxleys

    Correct Answer
    A. Cuticle,Huxley's, Henleys, and Outer root Sheath
    Explanation
    The correct answer is Cuticle, Huxley's, Henleys, and Outer root Sheath. This is the correct order of the layers of the hair follicle from the inside outward. The cuticle is the outermost layer, followed by Huxley's layer, Henleys layer, and finally the outer root sheath. These layers are important for the structure and function of the hair follicle.

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  • 39. 

    At the bottom of the hair follicule is found a small cone-shaped elevation called :

    • Papilla

    • Cuticle

    • Medulla

    • Cortex

    Correct Answer
    A. Papilla
    Explanation
    The correct answer is Papilla. The papilla is a small cone-shaped elevation found at the bottom of the hair follicle. It is responsible for supplying nutrients and oxygen to the hair follicle, promoting hair growth. The papilla contains blood vessels that nourish the hair follicle and help in the production of new hair cells.

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  • 40. 

    Hairs on the pubic and underarms area are called :

    • Sexual hairs

    • Asexual hairs

    • Ambosexual hairs

    • Terminal hairs

    Correct Answer
    A. Ambosexual hairs
  • 41. 

    Hair receives its nourishment from the hair papilla which contain:

    • Blood vessels

    • Muscles

    • Glands

    • Fatty Tissue

    Correct Answer
    A. Blood vessels
    Explanation
    Hair receives its nourishment from the hair papilla, which is located at the base of the hair follicle. The hair papilla contains blood vessels that supply oxygen and essential nutrients to the cells of the hair bulb. These blood vessels also remove waste products from the hair follicle. Therefore, the presence of blood vessels in the hair papilla is crucial for the growth and health of the hair.

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  • 42. 

    Hair Follicule are found in the :

    • Epidermis, Arrector Pili, & Dermis

    • Subcutis, Corneum, & Papilla

    • Dermis, Epidermis, & Subcutis

    • Epidermis, Arrector Pili, & Subcutis

    Correct Answer
    A. Dermis, Epidermis, & Subcutis
    Explanation
    Hair follicles are found in the dermis, epidermis, and subcutis. The dermis is the middle layer of the skin and contains the hair follicles, which are responsible for hair growth. The epidermis is the outermost layer of the skin and covers the hair follicles. The subcutis, also known as the hypodermis, is the deepest layer of the skin and provides insulation and cushioning for the body. Together, these three layers of the skin house the hair follicles and support their growth.

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  • 43. 

    No coloring matter is present in grey hair or :

    • Black hair

    • Brown hair

    • Albino hair

    • Red hair

    Correct Answer
    A. Albino hair
    Explanation
    Grey hair is characterized by a loss of pigment, resulting in a lack of color. Albino hair refers to hair that is completely devoid of pigment, appearing white or very pale. This lack of coloring matter in both grey and albino hair is due to a decrease in melanin production, the pigment responsible for hair color. Therefore, albino hair is the correct answer as it aligns with the absence of coloring matter in grey hair.

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  • 44. 

    The average rate of hair growth on the body is approximately :

    • 1/4 inch a month

    • 1/2 inch a month

    • 1/4 inch a week

    • 1/2 inch a week

    Correct Answer
    A. 1/2 inch a month
    Explanation
    On average, hair grows at a rate of approximately 1/2 inch per month. This means that over the course of a month, hair will grow half an inch in length.

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  • 45. 

    Which of the following statement about the " skin" is not true :

    • Skin is thicker in men than in women and in adult than in child

    • Warmth contracts the skin

    • Friction and pressure tend to increase the thickness of the skin

    • The skin is thinnest on eyelids

    Correct Answer
    A. Warmth contracts the skin
    Explanation
    The statement "Warmth contracts the skin" is not true. Warmth actually dilates the blood vessels in the skin, causing it to expand and relax, rather than contract.

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  • 46. 

    The pigment of the hair is found in the

    • Cuticle

    • Papilla

    • Cortex

    • Medulla

    Correct Answer
    A. Cortex
    Explanation
    The pigment of the hair is found in the cortex. The cortex is the middle layer of the hair shaft and contains the pigment-producing cells called melanocytes. These cells produce melanin, the pigment responsible for giving hair its color. The cortex also provides strength, structure, and elasticity to the hair. The cuticle is the outermost layer of the hair that protects it, the papilla is the base of the hair follicle where the hair grows from, and the medulla is the innermost layer of the hair, which is not always present in all hair types.

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  • 47. 

    Vellus hairs begin their growth :

    • In a lobe of sudoriferous glands

    • In the small pores

    • In the moles

    • In a lobe of the sebaceous glands

    Correct Answer
    A. In a lobe of the sebaceous glands
    Explanation
    Vellus hairs are fine, short, and non-pigmented hairs that cover most of the body. They typically begin their growth in a lobe of the sebaceous glands. Sebaceous glands are responsible for producing sebum, an oily substance that lubricates and protects the skin. The vellus hairs that grow in these glands are usually soft and barely noticeable.

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  • 48. 

    Which of the following statement is not true ?

    • The substance most produced in the hair is melanin

    • The substance most produced in the epidermis is keratin

    • The substance most produced in the dermis is collagen

    • The substance most produced in the subcutis is fat

    Correct Answer
    A. The substance most produced in the hair is melanin
    Explanation
    The substance most produced in the hair is melanin. Melanin is responsible for the color of hair and is produced by specialized cells called melanocytes in the hair follicles. It provides protection against harmful UV radiation from the sun and gives hair its pigmentation.

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  • 49. 

    The primary purpose of the hair in the head is to :

    • Keep the scalp oily

    • Protect the head

    • Keep the scalp dry

    • Keepdandruff in place

    Correct Answer
    A. Protect the head
    Explanation
    The primary purpose of the hair in the head is to protect the head. Hair acts as a natural barrier against external factors such as sunlight, dust, and other environmental elements. It helps to regulate body temperature by providing insulation to the scalp. Additionally, hair also plays a role in cushioning the head against minor impacts and injuries.

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