Question

Multipolar neurons means
A) With one dendron and one axon
B) With many dendrites and one axon
C) With one dendron and no axon
D) With many dendrites and no axon

Answer 1

Hint: Neurons (nerve cells) are the functional components of the nervous system. While they differ in size and form, most have structural features similar to the left-shown spinal cord neuron. Neurons have at their heart an extended region of cytoplasm called the cell body.

Complete answer:
A multipolar neuron is a type of neuron that has a single axon and several dendrites (and dendritic branches), allowing a lot of information from other neurons to be incorporated. Such processes are projections from the body of neuron cells.

In the central nervous system, multipolar neurons comprise the majority of neurons. Motor neurons are included, and interneurons/relaying neurons are most commonly located in the brain cortex and the spinal cord. Multipolar neurons in autonomic ganglia are located peripherally.

There are three or more processes connected to the cell bodies of multipolar neurons.
The axon, which conducts electrochemical impulses (action potential) between cells, serves as one mechanism. The processes that remain are dendrites. The cell body and dendrites together form the multipolar neurons' receptive zone.

For the axons of other neurons to approach and form synapses, the dendrites and their branches provide additional surface space. A mixture of excitatory and inhibitory synapses enables synaptic integration between neurons of the central nervous system to take place.

Multipolar neuron axons are always very long and can bring out potential for action in the brain, down the spinal cord and down the neuron. Axons are also covered by a sequence of cells from Schwann. Impulses occur only in the gaps between Schwann cells, which speed up the conduction of the impulse.

Thus the correct answer is option (B) With many dendrites and one axon.

Note: Multipolar neurons vary in size and form depending on their location and function. In some of the neurons that regulate body motions, this difference can be seen.