3-L1+
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Questions and Answers

What is the main function of the surface layer of cells in the epidermis?

  • To facilitate cell renewal
  • To induce cell death
  • To protect against water loss across the epithelium (correct)
  • To promote cell differentiation
  • What is the process by which cells become irregular in shape and flatten as they accumulate keratin?

  • Keratinization (correct)
  • Cell differentiation
  • Apoptosis
  • Cell renewal
  • Where is stratified cuboidal epithelium typically found?

  • In the skin
  • In the urinary bladder
  • In the small intestine
  • In the inner sides of pancreatic ducts and salivary glands (correct)
  • What is the function of microvilli in epithelial cells?

    <p>To increase the surface area of the cell surface</p> Signup and view all the answers

    What is the name of the epithelium that lines the urinary bladder and parts of the ureters and urethra?

    <p>Transitional epithelium (Urothelium)</p> Signup and view all the answers

    What is the function of the umbrella cells in the transitional epithelium?

    <p>To stretch the epithelium</p> Signup and view all the answers

    What is the purpose of the keratin layer in the skin?

    <p>To protect the skin</p> Signup and view all the answers

    What is the name of the process by which cells become thin, inactive, and lack nuclei?

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

    What is a characteristic of stratified epithelial tissue?

    <p>It has more than one layer of cells</p> Signup and view all the answers

    What is the function of cilia in epithelial cells?

    <p>To permit movement of materials over the surface of the epithelium</p> Signup and view all the answers

    What is the purpose of occluding cell junctions?

    <p>To prevent diffusion of substances between adjacent cells</p> Signup and view all the answers

    Where is cell division typically found in stratified epithelial tissue?

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

    What is the function of stratified squamous epithelium?

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

    How do the cells change shape as they migrate towards the surface in stratified squamous epithelium?

    <p>They become flattened</p> Signup and view all the answers

    What is the main difference between stratified squamous non-keratinized epithelium and stratified squamous keratinized epithelium?

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

    Where is stratified squamous non-keratinized epithelium typically found?

    <p>In the lining of the mouth and esophagus</p> Signup and view all the answers

    What is the purpose of keratin in stratified squamous keratinized epithelium?

    <p>To provide waterproofing and resistance to friction</p> Signup and view all the answers

    What is the shape of the cells in the lower layers of stratified squamous epithelium?

    <p>Roughly polygonal</p> Signup and view all the answers

    What is the primary function of the basal layers in stratified squamous epithelium?

    <p>To continually replicate and replace cells</p> Signup and view all the answers

    How are cells lost at the surface of stratified epithelial tissue replaced?

    <p>Through cell replacement from underneath</p> Signup and view all the answers

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