Question

Largest number of cell bodies of neurons in our body are found in the __________.
A. Retina
B. Spinal cord
C. Brain
D. Tongue

Answer 1

Hint:-The nervous system consists of neurons, specialised cells capable of acquiring and transmitting chemical or electrical signals, and glia, cells that provide neurons with support functions by performing a neuron-complementary information processing role. A neuron, which transmits a signal from one position to another, may be likened to an electrical cable.

Complete answer:
The "enchanted loom," which is our cortex, contains nerve cells. While axons enter all areas of the body, in the central nervous system ( brain and spinal cord), in certain regions defined as grey matter, the vast majority of nerve cell bodies remain. In the ganglia (small bundles of nerve cells) of the sympathetic and parasympathetic nervous systems, comparatively few nerve cell bodies reside peripherally.
A single neuron can not do so much on its own, and the role of the nervous system relies on groups of neurons working together. To stimulate or suppress their behaviour, individual neurons connect to other neurons, creating circuits that can interpret incoming input and conduct a response. Neuronal circuits, consisting of just a few neurons, can be very simple, or they can require more complex neuronal networks.
The key function of the central nervous system (brain and spinal cord) is to combine the sensory signals received by sensory nerves and processes from the internal and external world and ultimately relay the nerve impulses to the effectors (muscles and glands). Thus, the brain has the largest number of cell bodies of neurons (grey matter) as the centre of processing information. The spinal cord is a way of communicating between the brain and the peripheral nerves.
It also has H-shaped grey matter (neuron cell bodies) and white matter (the myelinated axons that bring signals to and from the brain) elsewhere. Since retina and tongue nerves serve to perform sensory pathway information; they have a single axon with strongly branched dendrites, but no cell bodies.
So from these discussions we can conclude that the brain has the largest number of cell bodies of neurons in our body.
Thus, the right option is C.

Note:- The nerves and glia make up the nervous system. Neurons are complex cells capable of processing both electrical and chemical signals. Many neurons include axons that transmit signals to other neurons or tissues, and dendrites that absorb these signals. Four major types of neurons are available: unipolar, bipolar, multipolar, and pseudounipolar. In the nervous system, glia are non-neuronal cells that facilitate neuronal growth and signalling.