Histocytes Overview and Structure

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Questions and Answers

What type of cells are described as small irregular branching, star-shaped cells?

Blood cells

Neurons

Bone cells

Pericytes (correct)

Bone marrow is responsible for the production of blood cells.

True

What are the primary functions of pericytes?

Support and regulate blood vessel function

What type of cell is formed when histocytes fuse together?

Foreign body giant cell Signup and view all the answers

Pericytes are located around _____ vessels.

blood Signup and view all the answers

Match the following terms with their descriptions:

Bone marrow = Production of blood cells Pericytes = Cells supporting blood vessels Blood cells = Cells responsible for transporting oxygen LM = Light microscopy technique Signup and view all the answers

Foreign body giant cells are responsible for engulfing small foreign bodies.

False Signup and view all the answers

What is the function of foreign body giant cells?

To engulf large foreign bodies. Signup and view all the answers

Histocytes, when fused together, form multinucleated cells known as _______.

foreign body giant cells Signup and view all the answers

Match the following terms with their descriptions:

Histiocytes = Type of immune cell that can fuse to form giant cells Multinucleated cells = Cells with multiple nuclei typically formed by fusion Foreign body giant cells = Specialized cells that engulf large foreign bodies Engulfing = The process of internalizing particles or cells Signup and view all the answers

Which type of cells are found in the skin and are responsible for immune responses?

Langerhan's cells Signup and view all the answers

Microglia cells are found in the kidney.

False Signup and view all the answers

What type of cells have the same structure and function as fixed cells?

Mesengial cells Signup and view all the answers

In the central nervous system, there are __________ cells.

microglia Signup and view all the answers

Match the following locations with their corresponding cell types:

CNS = Microglia cells Skin = Langerhan's cells Kidney = Mesengial cells Signup and view all the answers

What characteristic features do secretory cells display?

Well-developed rough endoplasmic reticulum Signup and view all the answers

The nucleus in secretory cells is large and easily visible.

False Signup and view all the answers

Name one organelle found in secretory cells.

Golgi apparatus Signup and view all the answers

Secretory granules are described as __________ or hidden.

masked Signup and view all the answers

Match the organelles with their functions:

Mitochondria = Energy production Rough Endoplasmic Reticulum = Protein synthesis Golgi Apparatus = Packaging of proteins Secretory Granules = Storage of secreted substances Signup and view all the answers

What staining method is used to visualize reticular fibers?

Gomori’s reticulin stain Signup and view all the answers

Reticular fibers can be stained using H&E methods.

False Signup and view all the answers

What is another term for reticular fibers based on their staining properties?

argyrophilic or argentaffin fibers Signup and view all the answers

Reticular fibers can be stained black by using _____ impregnation methods.

silver Signup and view all the answers

Match the following terms related to reticular fibers:

Gomori’s reticulin stain = Specific stain for reticular fibers Argyrophilic = Staining affinity for silver Silver impregnation methods = Methods for visualizing reticular fibers H&E stain = Common stain not used for reticular fibers Signup and view all the answers

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.

Histocytes Overview and Structure

Podcast Beta

Questions and Answers

What type of cells are described as small irregular branching, star-shaped cells?

Bone marrow is responsible for the production of blood cells.

What are the primary functions of pericytes?

What type of cell is formed when histocytes fuse together?

Pericytes are located around _____ vessels.

Match the following terms with their descriptions:

Foreign body giant cells are responsible for engulfing small foreign bodies.

What is the function of foreign body giant cells?

Histocytes, when fused together, form multinucleated cells known as _______.

Match the following terms with their descriptions:

Which type of cells are found in the skin and are responsible for immune responses?

Microglia cells are found in the kidney.

What type of cells have the same structure and function as fixed cells?

In the central nervous system, there are __________ cells.

Match the following locations with their corresponding cell types:

What characteristic features do secretory cells display?

The nucleus in secretory cells is large and easily visible.

Name one organelle found in secretory cells.

Secretory granules are described as __________ or hidden.

Match the organelles with their functions:

What staining method is used to visualize reticular fibers?

Reticular fibers can be stained using H&E methods.

What is another term for reticular fibers based on their staining properties?

Reticular fibers can be stained black by using _____ impregnation methods.

Match the following terms related to reticular fibers:

Study Notes

Histocytes

Structure of Histocytes

Location

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