Types Of Neuroglia In The CNS/PNS

2.

Have few processes and produce a myelin sheath in CNS; each can myelinate parts of several axons

Astrocytes
Oligodendrocytes
Microglia
Ependymal cells
Schwann Cells

Correct Answer

A. Oligodendrocytes

Explanation

Oligodendrocytes are responsible for producing the myelin sheath in the central nervous system (CNS). Unlike Schwann cells, which myelinate axons in the peripheral nervous system (PNS), oligodendrocytes can myelinate parts of several axons. This means that one oligodendrocyte can provide myelin sheath to multiple axons, making them efficient in covering a larger area of the CNS. Astrocytes, microglia, and ependymal cells have different functions and are not directly involved in myelination.

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3.

Small, phagocytic neuroglia that produce the nervous system by engulfing microbes and removing debris of dead cells

Astrocytes
Oligodendrocytes
Microglia
Ependymal cells
Schwann Cells

Correct Answer

A. Microglia

Explanation

Microglia are small, phagocytic neuroglia that play a crucial role in the immune defense of the central nervous system. They are responsible for engulfing and removing microbes and debris from dead cells, helping to maintain the overall health and function of the nervous system. Unlike other types of neuroglia, such as astrocytes and oligodendrocytes, microglia are specifically specialized in immune responses within the central nervous system. Ependymal cells are involved in the production and circulation of cerebrospinal fluid, while Schwann cells are responsible for myelinating peripheral nerves.

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4.

Star-shaped cells that perform several functions in support of neurons

Astrocytes
Oligodendrocytes
Microglia
Ependymal cells
Schwann cells

Correct Answer

A. Astrocytes

Explanation

Astrocytes are star-shaped cells that perform several functions in support of neurons. They provide physical and metabolic support to neurons, regulate the chemical balance of the brain, and help in the formation of synapses. They also play a role in the repair and regeneration of neural tissue. Astrocytes are the most abundant type of glial cells in the central nervous system and are essential for the proper functioning of the brain.

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5.

Line the brain ventricles and the central canal of the spinal cord; they secrete and aid in the circulation of cerebrospinal fluid and they form the blood-cerebrospinal fluid barrier

Astrocytes
Oligodendrites
Ependymal cells
Schwann cells
Microglia

Correct Answer

A. Ependymal cells

Explanation

Ependymal cells are the correct answer because they line the brain ventricles and the central canal of the spinal cord. They secrete and aid in the circulation of cerebrospinal fluid, which helps to protect and nourish the brain and spinal cord. Additionally, ependymal cells form the blood-cerebrospinal fluid barrier, which regulates the exchange of substances between the blood and the cerebrospinal fluid.

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Types Of Neuroglia In The CNS/Pns

Produce the myelin sheaths around PNS axons

Quiz Preview

Have few processes and produce a myelin sheath in CNS; each can myelinate parts of several axons

Small, phagocytic neuroglia that produce the nervous system by engulfing microbes and removing debris of dead cells

Star-shaped cells that perform several functions in support of neurons

Line the brain ventricles and the central canal of the spinal cord; they secrete and aid in the circulation of cerebrospinal fluid and they form the blood-cerebrospinal fluid barrier