Microanatomy: Cell and Tissue Identification
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Questions and Answers

What are the primary cells responsible for synthesizing collagen in the ECM?

  • Epithelial cells
  • Fibroblasts (correct)
  • Adipocytes
  • Chondrocytes
  • Which type of collagen is primarily involved in forming reticular fibers?

  • Type I
  • Type II
  • Type III (correct)
  • Type IV
  • How many different types of collagen polypeptide chains have been identified?

  • 15
  • 36
  • 10
  • 28 (correct)
  • What structure do three precursor protein chains form during collagen synthesis?

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

    What combination of proteins makes up elastic fibres in the ECM?

    <p>Elastin and fibrillin</p> Signup and view all the answers

    What process occurs after the secretion of procollagen by fibroblasts?

    <p>Proteolytic cleavage</p> Signup and view all the answers

    Which type of collagen is most commonly associated with providing tensile strength?

    <p>Type I</p> Signup and view all the answers

    In routine histology staining, collagen fibers typically appear in what color?

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

    What are the three types of junctions that epithelial cells use to attach to each other?

    <p>Occluding, Anchoring, and Communication junctions</p> Signup and view all the answers

    Which component is NOT part of the basement membrane?

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

    How are epithelial cells nourished?

    <p>Diffusion from underlying capillary beds</p> Signup and view all the answers

    What happens to the epithelial cells as they regenerate?

    <p>Young cells migrate towards the surface and are shed</p> Signup and view all the answers

    What is the role of occluding junctions in epithelial cells?

    <p>They maintain the integrity of the epithelial barrier</p> Signup and view all the answers

    Which characteristic is true about epithelial tissue?

    <p>It undergoes continuous cell regeneration.</p> Signup and view all the answers

    Which type of epithelial tissue is characterized by multiple layers of cells?

    <p>Stratified epithelium</p> Signup and view all the answers

    What type of modifications can epithelial cells have for specialized functions?

    <p>Specialized surface and internal modifications</p> Signup and view all the answers

    What is the primary focus of human histology?

    <p>Microscopic study of biological material and relationship between structure and function</p> Signup and view all the answers

    Which procedure involves processing thin slices of tissue for microscopic study?

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

    Why is microanatomy knowledge essential for MLTs when selecting tissue samples?

    <p>To ensure proper orientation and representation of the tissue in sections</p> Signup and view all the answers

    What type of collagen is primarily found in hyaline cartilage?

    <p>Type II collagen</p> Signup and view all the answers

    Which type of cartilage is characterized by both Type I and Type II collagen?

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

    What is a key factor that MLTs must evaluate when assessing the quality of a prepared tissue section?

    <p>Proper representation of the specimen in the section</p> Signup and view all the answers

    In immunohistochemical staining, why is it vital for MLTs to have a good understanding of microanatomy?

    <p>To locate the specific cell or tissue type being demonstrated</p> Signup and view all the answers

    What is the primary role of osteoblasts in the bone formation process?

    <p>To secrete osteoid</p> Signup and view all the answers

    Which type of tissue is prepared into thin slices to facilitate microscopic examination?

    <p>Any type of biological tissue</p> Signup and view all the answers

    Where are osteocytes primarily located?

    <p>In channel-like structures called canaliculi</p> Signup and view all the answers

    What role does microanatomy knowledge play in troubleshooting potential errors in the histology lab?

    <p>It allows for recognition of tissue staining issues and misidentifications.</p> Signup and view all the answers

    What is the main function of unilocular adipose tissue?

    <p>Store fat for energy</p> Signup and view all the answers

    What is the significance of using known positive control slides in histology?

    <p>They help establish staining times and assess method success.</p> Signup and view all the answers

    Which statement is true regarding multilocular adipose tissue?

    <p>It produces heat through fat metabolism.</p> Signup and view all the answers

    What is a notable characteristic of osteoid?

    <p>It is mostly made up of type I collagen.</p> Signup and view all the answers

    Which type of cartilage can be identified by the presence of elastic fibers?

    <p>Elastic cartilage</p> Signup and view all the answers

    What surrounds individual muscle fibres or cells?

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

    What is the primary structural characteristic of skeletal muscle cells in longitudinal section?

    <p>Evident cross striations</p> Signup and view all the answers

    Which feature is unique to cardiac muscle cells compared to skeletal muscle cells?

    <p>Centrally located nuclei</p> Signup and view all the answers

    What term describes the specialized cell junctions found in cardiac muscle?

    <p>Intercalated discs</p> Signup and view all the answers

    Which type of muscle lacks a population of resident stem cells?

    <p>Cardiac muscle</p> Signup and view all the answers

    What is the key functional characteristic of smooth muscle cells?

    <p>Rhythmic involuntary contractions</p> Signup and view all the answers

    In which section do smooth muscle cells appear as linear bundles?

    <p>Longitudinal section</p> Signup and view all the answers

    What is the arrangement of contractile proteins in smooth muscle cells compared to skeletal and cardiac muscle?

    <p>Less organized</p> Signup and view all the answers

    What is the main function of the fibrous trabeculae in lymph nodes?

    <p>To provide support to the lymph node structure</p> Signup and view all the answers

    What characterizes a secondary follicle in the lymph node?

    <p>It contains a germinal center with less densely staining areas</p> Signup and view all the answers

    Which cells are primarily responsible for the non-specific phagocytic activity in lymph nodes?

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

    What is the primary route through which lymphocytes enter the lymph nodes?

    <p>Through afferent lymphatic vessels</p> Signup and view all the answers

    What is the role of the cortical sinus in lymph nodes?

    <p>To collect lymph from the subcapsular sinus</p> Signup and view all the answers

    What distinguishes the medulla of a lymph node from the cortex?

    <p>The presence of Hassall's corpuscles</p> Signup and view all the answers

    Which of the following statements about the lymph node structure is FALSE?

    <p>The superficial cortex is only composed of macrophages.</p> Signup and view all the answers

    What happens to lymph nodes during an active immune response?

    <p>They greatly enlarge in size</p> Signup and view all the answers

    Study Notes

    Outcome 1 - Describing Appearance and Identifying Cell/Tissue Types

    • This outcome focuses on describing the appearance of cells and tissues and identifying specific types using microscopy (brightfield) and/or digital images.
    • Microanatomy is crucial for understanding the histology lab, specimen processing, and troubleshooting.
    • Knowledge of tissue structure is vital for selecting appropriate samples for pathologists.
    • Understanding tissue microanatomy helps in correctly preparing specimens for microscopic analysis.

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    Description

    This quiz focuses on describing the appearance of cells and tissues while identifying specific types using microscopy and digital images. Understanding microanatomy is essential for histology labs and ensures proper specimen processing for pathologists. Test your knowledge of tissue structures and their importance in microscopic analysis.

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