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Questions and Answers

What is the primary function of microvilli?

  • Increasing contact surface with neighboring cells
  • Substance exchange (correct)
  • Fluid displacement
  • Anchoring the cell to the basement membrane
  • Where are cilia primarily found?

  • Epididymis
  • Respiratory tract epithelia (correct)
  • Digestive epithelium
  • Kidney tubules
  • What is the main function of tight junctions?

  • Increasing contact surface with neighboring cells
  • Restricting movement of water and molecules (correct)
  • Substance exchange
  • Anchoring the cell to the basement membrane
  • What is the function of interdigitations at the lateral border?

    <p>Increasing contact surface with neighboring cells</p> Signup and view all the answers

    What is the primary function of hemidesmosomes at the basal border?

    <p>Anchoring the cell to the basement membrane</p> Signup and view all the answers

    What is the approximate height of microvilli?

    <p>1-2 µm</p> Signup and view all the answers

    Where are stereocilia primarily found?

    <p>Epididymis and inner ear</p> Signup and view all the answers

    What is the main function of adherent junctions?

    <p>Anchoring the cell to the basement membrane</p> Signup and view all the answers

    What is the function of interdigitations at the lateral border?

    <p>Increasing contact surface with neighboring cells</p> Signup and view all the answers

    What is the primary function of gap junctions at the lateral border?

    <p>Facilitate ion and molecule passage</p> Signup and view all the answers

    What is the approximate length of cilia?

    <p>15-20 µm</p> Signup and view all the answers

    Which type of cell border specialization forms a seal between neighboring epithelial cells, restricting movement of water and molecules?

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

    Where are stereocilia primarily found?

    <p>Epididymis and inner ear</p> Signup and view all the answers

    What is the primary function of microvilli?

    <p>Stabilization and substance exchange</p> Signup and view all the answers

    What is the main function of interdigitations at the lateral border?

    <p>Increase contact surface with neighboring cells</p> Signup and view all the answers

    Microvilli are primarily found in the respiratory tract epithelia

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

    Desmosomes primarily consist of electrodense reinforcement and are labile in function

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

    Stereocilia are modified microvilli with secretory and sensory functions

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

    Tight junctions restrict movement of water and molecules between neighboring epithelial cells

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

    Cilia are primarily found in the digestive epithelium and kidney tubules

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

    Microvilli are primarily found in the respiratory tract epithelia

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

    Desmosomes primarily consist of electrodense reinforcement and are labile in function

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

    Tight junctions restrict movement of water and molecules between neighboring epithelial cells

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

    Cilia are primarily found in the digestive epithelium and kidney tubules

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

    Stereocilia are modified microvilli with secretory and sensory functions

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

    Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange

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

    Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement

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

    Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions

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

    Tight junctions form a seal between neighboring epithelial cells, restricting movement of water and molecules

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

    Basal border specializations include ______, which anchor the cell to the basement membrane using integrin proteins

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

    Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange

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

    Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement

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

    Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions

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

    Lateral border specializations include tight junctions, adherent junctions, desmosomes, and interdigitations

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

    Basal border specializations include ______, which anchor the cell to the basement membrane using integrin proteins

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

    Study Notes

    Cell Membrane Specializations and Functions

    • Apical border specializations include microvilli, cilia, and stereocilia, with specific functions and locations in the body
    • Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange
    • Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement
    • Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions
    • Lateral border specializations include tight junctions, adherent junctions, desmosomes, and interdigitations
    • Tight junctions form a seal between neighboring epithelial cells, restricting movement of water and molecules
    • Adherent junctions consist of parallel cell membranes with electrodense reinforcement and are labile in function
    • Desmosomes appear as punctate structures, with electrodense material and microfilaments, primarily tonofilaments
    • Interdigitations are lamelliform processes of the cell membrane that increase contact surface with neighboring cells
    • Substance exchange at the lateral border includes gap junctions, plate-shaped structures with a narrow pore-like channel for ion and molecule passage
    • Basal border specializations include hemidesmosomes, which anchor the cell to the basement membrane using integrin proteins
    • Each specialization has specific structures, functions, and locations in the body, contributing to the overall functioning of the cell membrane

    Cell Membrane Specializations and Functions

    • Apical border specializations include microvilli, cilia, and stereocilia, with specific functions and locations in the body
    • Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange
    • Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement
    • Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions
    • Lateral border specializations include tight junctions, adherent junctions, desmosomes, and interdigitations
    • Tight junctions form a seal between neighboring epithelial cells, restricting movement of water and molecules
    • Adherent junctions consist of parallel cell membranes with electrodense reinforcement and are labile in function
    • Desmosomes appear as punctate structures, with electrodense material and microfilaments, primarily tonofilaments
    • Interdigitations are lamelliform processes of the cell membrane that increase contact surface with neighboring cells
    • Substance exchange at the lateral border includes gap junctions, plate-shaped structures with a narrow pore-like channel for ion and molecule passage
    • Basal border specializations include hemidesmosomes, which anchor the cell to the basement membrane using integrin proteins
    • Each specialization has specific structures, functions, and locations in the body, contributing to the overall functioning of the cell membrane

    Cell Membrane Specializations and Functions

    • Apical border specializations include microvilli, cilia, and stereocilia, with specific functions and locations in the body
    • Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange
    • Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement
    • Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions
    • Lateral border specializations include tight junctions, adherent junctions, desmosomes, and interdigitations
    • Tight junctions form a seal between neighboring epithelial cells, restricting movement of water and molecules
    • Adherent junctions consist of parallel cell membranes with electrodense reinforcement and are labile in function
    • Desmosomes appear as punctate structures, with electrodense material and microfilaments, primarily tonofilaments
    • Interdigitations are lamelliform processes of the cell membrane that increase contact surface with neighboring cells
    • Substance exchange at the lateral border includes gap junctions, plate-shaped structures with a narrow pore-like channel for ion and molecule passage
    • Basal border specializations include hemidesmosomes, which anchor the cell to the basement membrane using integrin proteins
    • Each specialization has specific structures, functions, and locations in the body, contributing to the overall functioning of the cell membrane

    Cell Membrane Specializations and Functions

    • Apical border specializations include microvilli, cilia, and stereocilia, with specific functions and locations in the body
    • Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange
    • Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement
    • Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions
    • Lateral border specializations include tight junctions, adherent junctions, desmosomes, and interdigitations
    • Tight junctions form a seal between neighboring epithelial cells, restricting movement of water and molecules
    • Adherent junctions consist of parallel cell membranes with electrodense reinforcement and are labile in function
    • Desmosomes appear as punctate structures, with electrodense material and microfilaments, primarily tonofilaments
    • Interdigitations are lamelliform processes of the cell membrane that increase contact surface with neighboring cells
    • Substance exchange at the lateral border includes gap junctions, plate-shaped structures with a narrow pore-like channel for ion and molecule passage
    • Basal border specializations include hemidesmosomes, which anchor the cell to the basement membrane using integrin proteins
    • Each specialization has specific structures, functions, and locations in the body, contributing to the overall functioning of the cell membrane

    Cell Membrane Specializations and Functions

    • Apical border specializations include microvilli, cilia, and stereocilia, with specific functions and locations in the body
    • Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange
    • Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement
    • Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions
    • Lateral border specializations include tight junctions, adherent junctions, desmosomes, and interdigitations
    • Tight junctions form a seal between neighboring epithelial cells, restricting movement of water and molecules
    • Adherent junctions consist of parallel cell membranes with electrodense reinforcement and are labile in function
    • Desmosomes appear as punctate structures, with electrodense material and microfilaments, primarily tonofilaments
    • Interdigitations are lamelliform processes of the cell membrane that increase contact surface with neighboring cells
    • Substance exchange at the lateral border includes gap junctions, plate-shaped structures with a narrow pore-like channel for ion and molecule passage
    • Basal border specializations include hemidesmosomes, which anchor the cell to the basement membrane using integrin proteins
    • Each specialization has specific structures, functions, and locations in the body, contributing to the overall functioning of the cell membrane

    Cell Membrane Specializations and Functions

    • Apical border specializations include microvilli, cilia, and stereocilia, with specific functions and locations in the body
    • Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange
    • Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement
    • Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions
    • Lateral border specializations include tight junctions, adherent junctions, desmosomes, and interdigitations
    • Tight junctions form a seal between neighboring epithelial cells, restricting movement of water and molecules
    • Adherent junctions consist of parallel cell membranes with electrodense reinforcement and are labile in function
    • Desmosomes appear as punctate structures, with electrodense material and microfilaments, primarily tonofilaments
    • Interdigitations are lamelliform processes of the cell membrane that increase contact surface with neighboring cells
    • Substance exchange at the lateral border includes gap junctions, plate-shaped structures with a narrow pore-like channel for ion and molecule passage
    • Basal border specializations include hemidesmosomes, which anchor the cell to the basement membrane using integrin proteins
    • Each specialization has specific structures, functions, and locations in the body, contributing to the overall functioning of the cell membrane

    Cell Membrane Specializations and Functions

    • Apical border specializations include microvilli, cilia, and stereocilia, with specific functions and locations in the body
    • Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange
    • Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement
    • Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions
    • Lateral border specializations include tight junctions, adherent junctions, desmosomes, and interdigitations
    • Tight junctions form a seal between neighboring epithelial cells, restricting movement of water and molecules
    • Adherent junctions consist of parallel cell membranes with electrodense reinforcement and are labile in function
    • Desmosomes appear as punctate structures, with electrodense material and microfilaments, primarily tonofilaments
    • Interdigitations are lamelliform processes of the cell membrane that increase contact surface with neighboring cells
    • Substance exchange at the lateral border includes gap junctions, plate-shaped structures with a narrow pore-like channel for ion and molecule passage
    • Basal border specializations include hemidesmosomes, which anchor the cell to the basement membrane using integrin proteins
    • Each specialization has specific structures, functions, and locations in the body, contributing to the overall functioning of the cell membrane

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    Description

    Test your knowledge of cell membrane specializations and their functions with this quiz. Explore the specific structures, functions, and locations of apical, lateral, and basal border specializations, and their contributions to overall cell membrane function.

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