BMS 111 Histology Final Revision Part 2: Epithelial Cell Surfaces and Celiac Disease
15 Questions
5 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which structure forms a spot like junction and is similar to Zonula adherens?

  • Hemidesmosome
  • Macula adherens (Desmosomes) (correct)
  • Gap junction
  • Tight junction
  • What is the main function of Tight junctions in the columnar cells of the intestine?

  • Prevent movement of molecules & ions to the intercellular space (correct)
  • Facilitate paracellular transport
  • Allow free movement of ions across the cell membrane
  • Promote passage of toxic material from blood to tissue
  • What causes Celiac disease?

  • Intestinal inflammation due to viral infection
  • Mal-absorption due to overactive absorptive cells
  • Immune reaction against the wheat protein gluten (correct)
  • Excess production of microvilli
  • Which transmembrane protein linkers are present in Macula adherens (Desmosomes)?

    <p>Cadherin family</p> Signup and view all the answers

    Which cell junction prevents paracellular transport in the endothelium of blood capillaries in the brain?

    <p>Tight junction</p> Signup and view all the answers

    What is the function of Hemidesmosomes?

    <p>Anchor epithelial cells to the basement membrane</p> Signup and view all the answers

    What is the function of hemidesmosomes?

    <p>Connecting cells to the underlying basement membrane</p> Signup and view all the answers

    Where are basal infoldings found and what is their function?

    <p>In kidney tubules, to increase surface area of basal membrane</p> Signup and view all the answers

    What is the structure of gap junctions (nexus)?

    <p>Spot-like junction with intercellular space of 2-3 nm</p> Signup and view all the answers

    Which type of fibers are mainly synthesized by fibroblasts?

    <p>Collagen fibers</p> Signup and view all the answers

    What is the function of occluding (tight) junctions?

    <p>Forming barriers and regulating trans-cellular transport</p> Signup and view all the answers

    Where are cadherin sites located?

    <p>Between cells of stratified squamous epithelium</p> Signup and view all the answers

    What is the main function of intermediate filaments in hemidesmosomes?

    <p>Forming strong cellular attachment and strength throughout the epithelium</p> Signup and view all the answers

    What is the function of gap junctions?

    <p>Communicating and transmitting nerve impulses, ions, and small molecules</p> Signup and view all the answers

    What does C.T. stand for in the context of the text?

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

    Study Notes

    Cell Junctions

    • Fasciae adherentes, a type of anchoring junction, form a spot-like junction similar to Zonula adherens.
    • The main function of Tight junctions in the columnar cells of the intestine is to prevent the passage of molecules between cells.
    • Celiac disease is caused by an immune response to gluten.
    • Desmosomes (Macula adherens) contain transmembrane protein linkers such as cadherins.
    • Tight junctions in the endothelium of blood capillaries in the brain prevent paracellular transport.
    • The function of Hemidesmosomes is to attach epithelial cells to the underlying basement membrane.
    • Basal infoldings are found in the kidney and are specialized for reabsorption and ion transport.
    • Gap junctions (nexus) are composed of a cluster of connexons that form a channel.
    • Fibroblasts mainly synthesize collagen fibers.
    • The function of occluding (tight) junctions is to prevent the passage of molecules between cells.
    • Cadherin sites are located on the surface of cells.
    • The main function of intermediate filaments in hemidesmosomes is to provide mechanical strength.
    • Gap junctions allow for direct communication between cells through the exchange of ions and small molecules.
    • C.T. stands for Connective Tissue in the context of the text.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Prepare for your histology exam by revising topics related to epithelial cell surfaces, including lateral surface junctions, basement membrane specialization, and medical applications such as celiac disease. Understand the impact of celiac disease on intestinal inflammation and the decrease of microvilli of absorptive cells.

    More Like This

    Use Quizgecko on...
    Browser
    Browser