Cell Junctions Quiz
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Questions and Answers

Which type of secretion involves the entire cell bursting to release the secretion?

  • Merocrine secretion
  • Apocrine secretion
  • Holocrine secretion (correct)
  • Mucin secretion

    • What is the primary mode of secretion in sweat glands?

  • Holocrine secretion
  • Mucin secretion
  • Merocrine secretion (correct)
  • Apocrine secretion

    • In which glandular secretion type does the apical portion of cytoplasm become packed with secretory vesicles before being shed?

  • Mucin secretion
  • Holocrine secretion
  • Merocrine secretion
  • Apocrine secretion (correct)

    • Which type of gland secretes into ducts that open onto epithelial surfaces?

    <p>Exocrine gland</p> Signup and view all the answers

    What is the most common type of secretion that involves exocytosis from secretory vesicles?

    <p>Merocrine secretion</p> Signup and view all the answers

    Which glandular secretion type results in the loss of apical surface and cytoplasm during secretion?

    <p>Apocrine secretion</p> Signup and view all the answers

    What is the primary mechanism for the expansion of cartilage from within?

    <p>Chondrocytes dividing and secreting additional matrix, pushing the daughter cells apart</p> Signup and view all the answers

    What is the key difference between the structure of cartilage and bone?

    <p>Both a and b</p> Signup and view all the answers

    What is the primary function of the compact bone layer in a long bone?

    <p>To provide a superficial layer deposited during appositional growth</p> Signup and view all the answers

    Why does interstitial growth not occur in bone, unlike in cartilage?

    <p>Because the bone matrix is solid and calcified</p> Signup and view all the answers

    What is the primary function of the spongy bone layer in a long bone?

    <p>To line the internal cavity of the bone</p> Signup and view all the answers

    What is the primary structural difference between the compact bone and spongy bone layers in a long bone?

    <p>Compact bone has a more organized matrix structure around blood vessels, while spongy bone has a more porous structure</p> Signup and view all the answers

    Which type of connective tissue has fibers densely packed in a regular arrangement?

    <p>Reticular tissue</p> Signup and view all the answers

    What is the main function of fixed cells in connective tissue?

    <p>Repair, maintenance, and storage</p> Signup and view all the answers

    Which connective tissue has a solid, crystalline matrix?

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

    In which system does lymph flow?

    <p>Lymphatic system</p> Signup and view all the answers

    What type of connective tissue has fibers that create a loose, open framework?

    <p>Reticular tissue</p> Signup and view all the answers

    Which component is characteristic of fluid connective tissues like blood and lymph?

    <p>Watery matrix</p> Signup and view all the answers

    Which of the following statements about gap junctions is correct?

    <p>They permit chemical communication to coordinate activities of adjacent cells</p> Signup and view all the answers

    What is the primary function of desmosomes?

    <p>To interlock the cytoskeletons of adjacent cells for firm attachment</p> Signup and view all the answers

    Which of the following statements about hemidesmosomes is incorrect?

    <p>They are formed by interlocking junctional proteins called connexons</p> Signup and view all the answers

    What is the primary characteristic of simple squamous epithelium?

    <p>It is thin and flat, with irregular cell shapes and disc-shaped nuclei</p> Signup and view all the answers

    Which of the following tissues is not an example of simple squamous epithelium?

    <p>Epithelium lining the skin</p> Signup and view all the answers

    What is the primary function of occluding junctions (tight junctions)?

    <p>To prevent the passage of water and solutes between cells</p> Signup and view all the answers

    Which of the following statements about the structure of compact bone is correct?

    <p>All of the above statements are correct.</p> Signup and view all the answers

    What is the function of the periosteum?

    <p>Both b and c are correct.</p> Signup and view all the answers

    What is the purpose of lacunae in the bone matrix?

    <p>All of the above.</p> Signup and view all the answers

    Which statement about the structure of spongy bone is correct?

    <p>It is less dense and has a more open, porous structure than compact bone.</p> Signup and view all the answers

    What is the primary function of canaliculi in compact bone?

    <p>To facilitate the exchange of nutrients and waste between osteocytes and blood vessels.</p> Signup and view all the answers

    Which layer of the periosteum is responsible for appositional bone growth and repair?

    <p>The inner cellular layer</p> Signup and view all the answers

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