Properties of Hyaline Articular Cartilage Quiz
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Questions and Answers

What type of collagen is the main type found in fibrocartilage?

  • Type 2 collagen
  • Type 4 collagen
  • Type 3 collagen
  • Type 1 collagen (correct)
  • Which type of joint has hyaline articular cartilage that is made up of type 2 collagen?

  • SYN arthroses
  • AMPHI arthroses (correct)
  • DI arthroses
  • None of the above
  • Where is fibrocartilage typically found in the body?

  • In the synovium of diarthrodial joints (correct)
  • In the axillary skeleton
  • Between the bones of diarthrodial joints
  • In the fused suture lines of the skull
  • What happens to hyaline articular cartilage when it wears out?

    <p>It transforms into fibrocartilage</p> Signup and view all the answers

    Which joint type has a fibrous capsule surrounding it and is lined by synovium?

    <p>SYN arthroses</p> Signup and view all the answers

    What protects the PG aggregates from enzymatic degradation in the collagen network?

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

    Which enzyme targets the type 2 collagen arcade?

    <p>MMP 1</p> Signup and view all the answers

    In osteoarthritis (OA), which enzymes are up-regulated and considered 'out of control'?

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

    Which enzyme targets proteoglycans in the articular cartilage?

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

    Which factor up-regulates MMP enzymes in osteoarthritis?

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

    What helps stimulate cartilage metabolism and synthesis?

    <p>Growth Hormone</p> Signup and view all the answers

    Which enzymes are considered the 'villains' in cartilage degradation?

    <p>MMP 1 and MMP 13</p> Signup and view all the answers

    Which enzymes are part of the neutral matrix metalloproteases (NMMPs)?

    <p>MMP 3 and Collagenase 1</p> Signup and view all the answers

    What is the main function of articular cartilage in joints?

    <p>To confer compliance and deformability</p> Signup and view all the answers

    What happens when the collagen network in hyaline articular cartilage breaks down?

    <p>Escape of proteoglycan aggregates into the synovial space</p> Signup and view all the answers

    Which component of hyaline articular cartilage has a bottle brush configuration?

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

    Why does hyaline articular cartilage appear radiolucent on X-ray?

    <p>Due to water content</p> Signup and view all the answers

    What is the function of type 2 collagen in hyaline articular cartilage?

    <p>Providing strength and structure</p> Signup and view all the answers

    Why is articular cartilage like a sponge in terms of water content?

    <p>To act as a shock absorber</p> Signup and view all the answers

    What happens when the hyaline articular cartilage wears out in arthritis?

    <p>Joint space narrowing</p> Signup and view all the answers

    Why do chondrocytes occupy a relatively small surface area in hyaline articular cartilage?

    <p>To accommodate abundant matrix molecules</p> Signup and view all the answers

    What is the role of chondrocytes in osteoarthritis?

    <p>Multiply and try to synthesize more matrix molecules</p> Signup and view all the answers

    Where do chondrocytes derive from?

    <p>Mesenchymal cells</p> Signup and view all the answers

    What confers the property of deformability and the ability to distribute load in a reversible sponge-like fashion in hyaline articular cartilage?

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

    Where is Chondroitin Sulfate (CS) mainly located in the proteoglycan core protein in adult cartilage?

    <p>Superior aspect</p> Signup and view all the answers

    Which part of the proteoglycan monomer determines where and which glycosaminoglycans (GAGs) will be added on to the core?

    <p>Core Protein</p> Signup and view all the answers

    What renders Glycosaminoglycans (GAGs) highly hydrophilic enabling hydration and deformability of the cartilage matrix?

    <p>Negatively charged carboxyl groups</p> Signup and view all the answers

    What is the main function of the Hyaluronic Acid Binding Region (HABR) in proteoglycan monomers?

    <p>To bind to Hyaluronic Acid (HA)</p> Signup and view all the answers

    What allows the PG monomers or aggrecans to bind to Hyaluronic Acid (HA) forming PG aggregates?

    <p>Hyaluronic Acid Binding Region (HABR)</p> Signup and view all the answers

    Where is Keratan Sulfate (KS) enriched in the proteoglycan core protein in relation to Chondroitin Sulfate (CS)?

    <p>Amino-terminal</p> Signup and view all the answers

    What renders Glycosaminoglycans (GAGs) highly hydrophilic allowing for hydration of the cartilage matrix?

    <p>Negatively charged carboxyl groups</p> Signup and view all the answers

    What contributes significantly to the molecular weight of Proteoglycan monomers?

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

    What is the backbone of a Proteoglycan subunit?

    <p>Core Protein</p> Signup and view all the answers

    Which region contains the larger GAG chains in Proteoglycans of articular cartilage PGs?

    <p>Chondroitin Sulfate rich region</p> Signup and view all the answers

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