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 (D)</p> Signup and view all the answers

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

<p>5 (B)</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 (C)</p> Signup and view all the answers

What is the function of the papillae in the dermis?

<p>To increase friction (C)</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 (A)</p> Signup and view all the answers

What determines the color of human skin?

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

What type of glands are responsible for producing sweat?

<p>Sweat glands (A)</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 (C)</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 (D)</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 (B)</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 (B)</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 (D)</p> Signup and view all the answers

What is the origin of photophores in cartilaginous fishes?

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

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

<p>To secrete toxins (D)</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 (B)</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 (A)</p> Signup and view all the answers

What is characteristic of the epidermis of reptiles?

<p>The presence of epidermal scales, scutes, and plates (C)</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 (D)</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 (D)</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 (A)</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 (A)</p> Signup and view all the answers

What is the characteristic of the skin of reptiles?

<p>It is dry and granular. (B)</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 (C)</p> Signup and view all the answers

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

<p>Plumulae (D)</p> Signup and view all the answers

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

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

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

<p>Remiges (C)</p> Signup and view all the answers

Where are horny scales found in birds?

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

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