Histology: Membrane Proteins and Cell Structures
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Questions and Answers

What is a common characteristic of nuclei in malignant tumors?

  • Enlarged and abnormally shaped (correct)
  • Small and light staining
  • No abnormal nucleoli
  • Round and well-defined
  • What do cancer cells do to the genes controlling the apoptotic process?

  • Enhance them
  • Deactivate them (correct)
  • Multiply them
  • Ignore them
  • How does increasing magnification affect the field of view?

  • It becomes blurry
  • It increases
  • It decreases (correct)
  • It remains the same
  • Which part of the lens system is responsible for initial magnification?

    <p>Scanning power objective</p> Signup and view all the answers

    What does the coarse adjustment knob on a microscope primarily help with?

    <p>Initial focusing</p> Signup and view all the answers

    What component controls the distance between the slide and the objective in a microscope?

    <p>Aperture Diaphragm</p> Signup and view all the answers

    Which organelle is responsible for manufacturing all proteins secreted from cells?

    <p>Rough Endoplasmic Reticulum</p> Signup and view all the answers

    Which organelle is continuous with the rough endoplasmic reticulum and consists of tubules arranged in a network?

    <p>Smooth Endoplasmic Reticulum</p> Signup and view all the answers

    Which organelle is associated with tiny membranous vesicles and is shaped like hollow dinner plates?

    <p>Golgi Apparatus</p> Signup and view all the answers

    What are the spherical membranous sacs containing activated digestive enzymes?

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

    Which network consists of rods running through the cytosol and accessory proteins that link these rods to other cell structures?

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

    Which type of protein fibers are tough, insoluble, and composed of tetramer fibrils?

    <p>Intermediate filaments</p> Signup and view all the answers

    What type of proteins are tightly associated with the cell membrane?

    <p>Integral proteins</p> Signup and view all the answers

    Which type of junction prevents molecules from passing through the extracellular space between adjacent cells?

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

    What is the function of desmosomes in cell structure?

    <p>To prevent separation of adjacent cells</p> Signup and view all the answers

    Which process involves the movement of molecules from an area of higher concentration to an area of lower concentration?

    <p>Simple diffusion</p> Signup and view all the answers

    What are connexons responsible for in cell communication?

    <p>Connecting cells at gap junctions</p> Signup and view all the answers

    Which type of junction is responsible for communicating between adjacent cells?

    <p>Gap junctions</p> Signup and view all the answers

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