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Histology of the Skin
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Histology of the Skin

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@RadiantHyena

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Questions and Answers

Where is the dermis thickest in relation to the epidermis?

  • Palm
  • Back (correct)
  • Sole
  • Nose

    • Which layer of the skin contributes to the interdigitation of dermal papillae with epidermal ridges?

  • Subcutaneous tissue
  • Epidermis
  • Stratum lucidum
  • Dermis (correct)

    • What is the main difference between thick skin and thin skin?

  • Color of the skin
  • Thickness of the epidermis (correct)
  • Presence of subcutaneous fat
  • Amount of collagen in the dermis

    • Which area of the body has more generous amounts of subcutaneous fat?

    <p>Abdomen</p> Signup and view all the answers

    What contributes to the total skin thickness in different body sites?

    <p>Epidermal plus dermal layers</p> Signup and view all the answers

    Which type of cells are responsible for producing keratin in the epidermis?

    <p>Keratinocytes</p> Signup and view all the answers

    Where are melanocytes typically found within the epidermis?

    <p>Basal layer</p> Signup and view all the answers

    Which cell type plays a key role in the immune function of the skin?

    <p>Langerhans cells</p> Signup and view all the answers

    Which type of skin has the stratum lucidum layer?

    <p>Scalp skin</p> Signup and view all the answers

    What is the main function of Merkel cells?

    <p>Sensing touch sensations</p> Signup and view all the answers

    Where do slow-cycling stem cells primarily reside in the epidermis?

    <p>Stratum basale</p> Signup and view all the answers

    Which cells are responsible for giving the skin its color?

    <p>Melanocytes</p> Signup and view all the answers

    What determines the differences in skin color among different races?

    <p>Distribution of melanosomes in keratinocytes</p> Signup and view all the answers

    Where are Langerhans cells mainly located in the skin?

    <p>Stratum Spinosum</p> Signup and view all the answers

    What is the function of Merkel cells in the skin?

    <p>Act as mechano-receptors</p> Signup and view all the answers

    Which type of melanin is predominant in individuals with dark hair?

    <p>Eumelanin</p> Signup and view all the answers

    In what layer of the skin are melanin granules produced and then transferred to keratinocytes?

    <p>Stratum Basale</p> Signup and view all the answers

    What is the function of the Papillary layer of the dermis?

    <p>Has a network of elastic fibers</p> Signup and view all the answers

    Which cells in the dermis are responsible for collagen synthesis?

    <p>Fibroblast</p> Signup and view all the answers

    What is the main composition of the connective tissue in the dermis?

    <p>Bundles of type I collagen</p> Signup and view all the answers

    Where is the Basement Membrane (BM) located within the skin layers?

    <p>Between the stratum basale and papillary layer</p> Signup and view all the answers

    Which receptors are responsible for detecting movements of hairs on the skin?

    <p>Root hair plexuses</p> Signup and view all the answers

    In which regions are Tactile Corpuscles (Meissner corpuscles) predominantly found?

    <p>Fingertips, palms, and soles</p> Signup and view all the answers

    What is the main function of Lamellated (Pacinian) corpuscles in the skin?

    <p>Sensing coarse touch, pressure, and vibrations</p> Signup and view all the answers

    Which type of skin aging is primarily attributed to the passage of time?

    <p>Chronological aging</p> Signup and view all the answers

    What are the main clinical features of photoaging?

    <p>Dryness, wrinkling, telangiectasia, and pigmentation changes</p> Signup and view all the answers

    Which component of the skin is primarily affected by UV exposure leading to laxity?

    <p>Dermis</p> Signup and view all the answers

    What is a major aesthetic concern in the aging face related to subcutaneous fat?

    <p>Loss or redistribution of subcutaneous fat</p> Signup and view all the answers

    Which cells are responsible for detecting pressure in the skin through encapsulated mechanoreceptors?

    <p>Mechanoreceptors</p> Signup and view all the answers

    What are the main clinical features of photoaging in the skin?

    <p>Fine and course wrinkling, dryness, coarseness, telangiectasia, yellowness, and irregular patchy pigmentation</p> Signup and view all the answers

    What is a major component of aesthetic disharmony in the aging face?

    <p>Loss or redistribution of subcutaneous fat</p> Signup and view all the answers

    Which type of skin cancers are not related to melanocytes?

    <p>Non melanocytic skin cancers</p> Signup and view all the answers

    What is the effect of UV exposure on the skin in terms of color change?

    <p>Formation of freckles and melasma</p> Signup and view all the answers

    How does skin laxity occur as described in the text?

    <p>As a result of a thinned and damaged dermis</p> Signup and view all the answers

    Ruffini corpuscles are specialized for sensing fine touch and gentle pressure.

    <p>False</p> Signup and view all the answers

    Photoaging is caused solely by intrinsic chronological aging.

    <p>False</p> Signup and view all the answers

    Lamellated (Pacinian) corpuscles are encapsulated mechanoreceptors responsible for detecting vibrations.

    <p>True</p> Signup and view all the answers

    One of the main clinical features of photoaging is smooth skin texture.

    <p>False</p> Signup and view all the answers

    Skin aging only affects the epidermal layer of the skin.

    <p>False</p> Signup and view all the answers

    UV exposure primarily leads to an increase in collagen production in the skin.

    <p>False</p> Signup and view all the answers

    Subcutaneous fat loss causes skin laxity in the aging face.

    <p>True</p> Signup and view all the answers

    Melanoma is a non-melanocytic type of skin cancer.

    <p>False</p> Signup and view all the answers

    Tanning is a protective mechanism of the skin against UV damage.

    <p>False</p> Signup and view all the answers

    Darkening of the skin due to UV exposure is solely caused by increased melanin production.

    <p>False</p> Signup and view all the answers

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