SSC Selection Post 2020 PYQ — Question 42

The correct answer is option 2 i.e. Synapse.

• The site of transmission of electrical nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector) is called a synapse.
• It forms the structural foundation for communication between neurons in the central nervous system (CNS) and between neurons and muscle cells in the peripheral nervous system (PNS).

• A synapse is the junction formed between a presynaptic neuron and a postsynaptic neuron. When this connection occurs between a neuron and a muscle cell, it is specifically referred to as a neuromuscular junction.

Other Options:

• Dendrites are branched extensions of a nerve cell (neuron) that receive electrical signals from other neurons and transmit them toward the cell body (also called the soma).

• The axon, also known as a nerve fiber, is a part of the neuron responsible for transmitting nerve impulses away from the cell body.

• Each neuron usually possesses a single axon, which serves as a connection to other neurons, muscle cells, or gland cells, facilitating communication across the nervous system.

• Myelin is an insulating layer or sheath that forms around nerves, including those in the brain and spinal cord.