Integumentary System Pre-Test
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Questions and Answers

What is the main function of the integumentary system?

  • To produce hormones
  • To produce epithelial cells
  • To protect the tissues lying within it (correct)
  • To regulate body temperature

    • What is the outer layer of the epidermis composed of?

  • Melanocytes
  • Flattened cells (correct)
  • Dead cells
  • Connective tissue fibers

    • What is the origin of the dermis in vertebrate skin?

  • Epithelium
  • Endoderm
  • Mesoderm (correct)
  • Ectoderm

    • What type of protein makes up the Stratum corneum?

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

    How many layers are present in the epidermis of human skin?

    <p>5</p> Signup and view all the answers

    What is the primary function of the stratum basale?

    <p>To act as the basement layer of the epidermis</p> Signup and view all the answers

    What is the function of the papillae in the dermis?

    <p>To increase friction</p> Signup and view all the answers

    What is the difference between epidermal and dermal skin derivatives?

    <p>Epidermal derivatives are derived from the epidermis, while dermal derivatives are derived from the dermis</p> Signup and view all the answers

    What determines the color of human skin?

    <p>The presence of melanocytes</p> Signup and view all the answers

    What type of glands are responsible for producing sweat?

    <p>Sweat glands</p> Signup and view all the answers

    What is the importance of the integumentary system in maintaining homeostasis?

    <p>It regulates the ratio of water to salts in body fluids</p> Signup and view all the answers

    What is the term for the ability of certain animals to change the color of their skin?

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

    On which parts of the human body are sweat glands not found?

    <p>Lips, glans penis, ear drum, and nail bed</p> Signup and view all the answers

    What is the function of the oily secretion from sebaceous glands?

    <p>To keep the hair and skin smooth and soft, and impart an individual scent or odor</p> Signup and view all the answers

    What is unique about the epidermis of agnathans?

    <p>It is unstratified and has abundant unicellular mucous glands</p> Signup and view all the answers

    What is the origin of photophores in cartilaginous fishes?

    <p>Epidermal origin</p> Signup and view all the answers

    What is the function of the toxin-secreting goblet cells in sting rays?

    <p>To secrete toxins</p> Signup and view all the answers

    What causes the sandpaper texture of the skin of cartilaginous fish?

    <p>Placoid scales derived from the dermis</p> Signup and view all the answers

    What is unique about the scales of some caecilians and a few toads?

    <p>They are embedded in the dermis</p> Signup and view all the answers

    What is characteristic of the epidermis of reptiles?

    <p>The presence of epidermal scales, scutes, and plates</p> Signup and view all the answers

    What is the shape of the scutes on the ventral surface of snakes?

    <p>Smooth, quadrilateral or polyhedral</p> Signup and view all the answers

    What is the composition of the stratum corneum of crocodilians?

    <p>Warty and crested or non-overlapping scales</p> Signup and view all the answers

    What is the arrangement of the epidermal scutes on the carapace of turtles?

    <p>In three groups: neurals, coastals, and marginals</p> Signup and view all the answers

    What covers the limbs, tail, neck, and membrane connecting the carapace and plastron of turtles?

    <p>Small, non-overlapping epidermal scales</p> Signup and view all the answers

    What is the characteristic of the skin of reptiles?

    <p>It is dry and granular.</p> Signup and view all the answers

    What is the process called when snakes shed their entire outer stratum corneum in one piece?

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

    What type of feathers lie under the contour feathers in birds?

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

    What is the part of the feather that is embedded in the skin?

    <p>Quill or calamus</p> Signup and view all the answers

    What type of feathers are found on the wings of birds?

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

    Where are horny scales found in birds?

    <p>Only on the feet and base of the beak</p> Signup and view all the answers

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