Synapse: Definition, Types And Structure

Synapse: Definition, Types, And Structure

Question 1. Enumerate the different types of synapses.
Answer.

Anatomically, the synapses are of the following types:

• Axodendritic synapses (commonest)
• Axosomatic synapses
• Dendrosomatic synapses
• Dendroaxonic synapses
• Dendrodendritic synapses
• Axoaxonic synapses

Question 2. What are neuroglia? Enumerate the different types of neuroglia in central and peripheral nervous systems. Name the neuralgia responsible for the myelination of nerve fibers in the peripheral and central nervous systems.
Answer.

• The neuroglia are interstitial cells of the nervous system that provide structural and functional support to the neurons.
• The different types of neuroglia are present in the central nervous system (CNS) and peripheral nervous system (PNS).
• The Schwann cells (neurolemmocytes) form a myelin sheath around the peripheral nerve fibers. They also take part in the formation of the blood-brain barrier.
• The oligodendrocytes form a myelin sheath around the fibers of the central nervous system.

Different Types of Neuroglia Present in CNS and PNS