10-L1 Skin
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Questions and Answers

What is one of the functions of the skin?

  • To produce muscles
  • To regulate body temperature (correct)
  • To produce hormones
  • To produce bones

    • What type of cells are Langerhans cells?

  • Dendritic cells (correct)
  • Muscle cells
  • Epithelial cells
  • Fat cells

    • What is the main function of melanin?

  • To protect the DNA from UV radiation (correct)
  • To regulate body temperature
  • To produce keratin
  • To synthesize vitamin D

    • What is the outermost layer of the epidermis?

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

    What is the main component of the cells of the stratum corneum?

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

    What is the function of keratohyalin granules?

    <p>To help seal the deeper layers of the skin</p> Signup and view all the answers

    What is synthesized in the skin?

    <p>Vitamin D</p> Signup and view all the answers

    What is the main function of the stratum granulosum?

    <p>To help seal the deeper layers of the skin</p> Signup and view all the answers

    What is the shape of the dark cells in the apocrine sweat glands?

    <p>Inverted cone</p> Signup and view all the answers

    What type of epithelium lines the ducts of apocrine sweat glands?

    <p>Stratified cuboidal</p> Signup and view all the answers

    Where are apocrine sweat glands largely confined to?

    <p>Skin of the axillary and areolae</p> Signup and view all the answers

    What is the characteristic of the clear cells in apocrine sweat glands?

    <p>They have microinfolds and accumulate glycogen</p> Signup and view all the answers

    What is the approximate diameter of the secretory coil of eccrine sweat glands?

    <p>500-700 μm</p> Signup and view all the answers

    What is the function of the myoepithelial cells in apocrine sweat glands?

    <p>To help discharge the glandular secretion</p> Signup and view all the answers

    What is the characteristic of the ducts of apocrine sweat glands?

    <p>They are similar to the ducts of eccrine glands</p> Signup and view all the answers

    What is the primary function of the secretions of eccrine sweat glands?

    <p>Cooling the body</p> Signup and view all the answers

    How many eccrine sweat glands are present on the average person's skin?

    <p>3 million</p> Signup and view all the answers

    Where do the ducts of apocrine sweat glands open into?

    <p>Hair follicles</p> Signup and view all the answers

    What is the composition of the secretion of eccrine sweat glands?

    <p>Water and sodium chloride</p> Signup and view all the answers

    What is the characteristic of the secretion of apocrine sweat glands?

    <p>It is initially odorless but may acquire a distinctive odor</p> Signup and view all the answers

    What is the approximate daily production of eccrine sweat glands?

    <p>10 L/day</p> Signup and view all the answers

    What is the shape of the eccrine sweat glands?

    <p>Simple coiled tubular</p> Signup and view all the answers

    What is the location of the eccrine sweat glands with the highest density?

    <p>Soles of the feet</p> Signup and view all the answers

    What is the function of the dark cells in the eccrine sweat glands?

    <p>Having bactericidal activity</p> Signup and view all the answers

    What is the dermal-epidermal junction also known as?

    <p>Cutaneous basement membrane</p> Signup and view all the answers

    What is the function of the dermal-epidermal junction in wound reepidermisation?

    <p>To serve as a substrate for adhesion and migration of keratinocytes</p> Signup and view all the answers

    What is composed of the basal lamina and lamina reticularis?

    <p>Basement membrane</p> Signup and view all the answers

    What is the role of the dermal-epidermal junction in determining the polarity of basal keratinocytes?

    <p>To determine the spatial keratinocyte organisation</p> Signup and view all the answers

    What is the function of the dermal-epidermal junction in binding the epidermis to the dermis?

    <p>To bind tightly the epidermis to the dermis</p> Signup and view all the answers

    What is the lamina lucida and lamina densa part of?

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

    What is the function of the dermal-epidermal junction in epidermal stratification?

    <p>To allow the migration of keratinocytes into the upper layers</p> Signup and view all the answers

    What is the main component of the lamina reticularis?

    <p>Connective tissue</p> Signup and view all the answers

    What is the function of the dermis?

    <p>To support the epidermis and bind it to the subcutaneous tissue</p> Signup and view all the answers

    What is the thickness of the dermis on the back?

    <p>4 mm</p> Signup and view all the answers

    What is found between the stratum basale and the dermis?

    <p>A basement membrane</p> Signup and view all the answers

    What are the two components of the basement membrane?

    <p>Basal lamina and reticular lamina</p> Signup and view all the answers

    How do nutrients reach keratinocytes?

    <p>Through diffusion from the avascular dermis</p> Signup and view all the answers

    What is the composition of the papillary layer?

    <p>Loose connective tissue</p> Signup and view all the answers

    What is the function of the papillary plexus?

    <p>To supply blood to the dermal papillae</p> Signup and view all the answers

    What is the location of the dermal plexus?

    <p>In the dermis and hypodermis</p> Signup and view all the answers

    What is the dermal papillary layer composed of?

    <p>Loose connective tissue</p> Signup and view all the answers

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