35 Questions
What is the primary function of microvilli?
Substance exchange
Where are cilia primarily found?
Respiratory tract epithelia
What is the main function of tight junctions?
Restricting movement of water and molecules
What is the function of interdigitations at the lateral border?
Increasing contact surface with neighboring cells
What is the primary function of hemidesmosomes at the basal border?
Anchoring the cell to the basement membrane
What is the approximate height of microvilli?
1-2 µm
Where are stereocilia primarily found?
Epididymis and inner ear
What is the main function of adherent junctions?
Anchoring the cell to the basement membrane
What is the function of interdigitations at the lateral border?
Increasing contact surface with neighboring cells
What is the primary function of gap junctions at the lateral border?
Facilitate ion and molecule passage
What is the approximate length of cilia?
15-20 µm
Which type of cell border specialization forms a seal between neighboring epithelial cells, restricting movement of water and molecules?
Tight junctions
Where are stereocilia primarily found?
Epididymis and inner ear
What is the primary function of microvilli?
Stabilization and substance exchange
What is the main function of interdigitations at the lateral border?
Increase contact surface with neighboring cells
Microvilli are primarily found in the respiratory tract epithelia
False
Desmosomes primarily consist of electrodense reinforcement and are labile in function
True
Stereocilia are modified microvilli with secretory and sensory functions
True
Tight junctions restrict movement of water and molecules between neighboring epithelial cells
True
Cilia are primarily found in the digestive epithelium and kidney tubules
False
Microvilli are primarily found in the respiratory tract epithelia
False
Desmosomes primarily consist of electrodense reinforcement and are labile in function
False
Tight junctions restrict movement of water and molecules between neighboring epithelial cells
True
Cilia are primarily found in the digestive epithelium and kidney tubules
False
Stereocilia are modified microvilli with secretory and sensory functions
True
Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange
microvilli
Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement
cilia
Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions
stereocilia
Tight junctions form a seal between neighboring epithelial cells, restricting movement of water and molecules
tight junctions
Basal border specializations include ______, which anchor the cell to the basement membrane using integrin proteins
hemidesmosomes
Microvilli are 1-2 µm high, with actin filaments providing stability, found in digestive epithelium and kidney tubules, mainly for substance exchange
microvilli
Cilia are 10-15 µm in length, densely packed in respiratory tract epithelia, primarily for fluid displacement
cilia
Stereocilia, found in the epididymis and inner ear, are modified microvilli with secretory and sensory functions
stereocilia
Lateral border specializations include tight junctions, adherent junctions, desmosomes, and interdigitations
lateral
Basal border specializations include ______, which anchor the cell to the basement membrane using integrin proteins
hemidesmosomes
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
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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