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Questions and Answers
What type of cells are described as small irregular branching, star-shaped cells?
What type of cells are described as small irregular branching, star-shaped cells?
Bone marrow is responsible for the production of blood cells.
Bone marrow is responsible for the production of blood cells.
True (A)
What are the primary functions of pericytes?
What are the primary functions of pericytes?
Support and regulate blood vessel function
What type of cell is formed when histocytes fuse together?
What type of cell is formed when histocytes fuse together?
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Pericytes are located around _____ vessels.
Pericytes are located around _____ vessels.
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Match the following terms with their descriptions:
Match the following terms with their descriptions:
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Foreign body giant cells are responsible for engulfing small foreign bodies.
Foreign body giant cells are responsible for engulfing small foreign bodies.
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What is the function of foreign body giant cells?
What is the function of foreign body giant cells?
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Histocytes, when fused together, form multinucleated cells known as _______.
Histocytes, when fused together, form multinucleated cells known as _______.
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Match the following terms with their descriptions:
Match the following terms with their descriptions:
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Which type of cells are found in the skin and are responsible for immune responses?
Which type of cells are found in the skin and are responsible for immune responses?
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Microglia cells are found in the kidney.
Microglia cells are found in the kidney.
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What type of cells have the same structure and function as fixed cells?
What type of cells have the same structure and function as fixed cells?
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In the central nervous system, there are __________ cells.
In the central nervous system, there are __________ cells.
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Match the following locations with their corresponding cell types:
Match the following locations with their corresponding cell types:
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What characteristic features do secretory cells display?
What characteristic features do secretory cells display?
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The nucleus in secretory cells is large and easily visible.
The nucleus in secretory cells is large and easily visible.
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Name one organelle found in secretory cells.
Name one organelle found in secretory cells.
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Secretory granules are described as __________ or hidden.
Secretory granules are described as __________ or hidden.
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Match the organelles with their functions:
Match the organelles with their functions:
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What staining method is used to visualize reticular fibers?
What staining method is used to visualize reticular fibers?
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Reticular fibers can be stained using H&E methods.
Reticular fibers can be stained using H&E methods.
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What is another term for reticular fibers based on their staining properties?
What is another term for reticular fibers based on their staining properties?
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Reticular fibers can be stained black by using _____ impregnation methods.
Reticular fibers can be stained black by using _____ impregnation methods.
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Match the following terms related to reticular fibers:
Match the following terms related to reticular fibers:
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Study Notes
Histocytes
- Histocytes can fuse to form multinucleated cells called foreign body giant cells
- These cells engulf large foreign bodies.
- They are also known as phagocytes.
- They are found in various tissues, including the CNS, skin, and kidneys.
- In the CNS, they are called mesoglia cells or microglia cells
- In the skin, they are called Langerhans cells.
- In the kidneys, they are called mesangial cells.
Structure of Histocytes
- LM:
- Small, irregular, branching, star-shaped cells.
- The nucleus is small, eccentric, and often masked by granules.
- EM:
- Have features of secretory cells, including well-developed RER, mitochondria, Golgi apparatus, and electron-dense membrane-bound secretory granules.
- LM Staining:
- Not stained with H&E stain.
- Specifically stained black by silver impregnation methods (Gomori’s reticulin stain).
- Reticular fibers are called argyrophilic or argentaffin fibers.
Location
- Bone marrow (where blood cells are produced).
- Around blood vessels as pericytes.
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Description
This quiz covers the characteristics and functions of histocytes, including their capability to form multinucleated giant cells and their subclasses in various tissues. You will learn about their structure through light and electron microscopy, as well as their staining properties. Ideal for students studying cellular biology or histology.
