Question

WHAT ARE THE TYPES OF NEURONS?

Answer 1

There are three types of neuron SENSORY NEURON which conduct impulses from sense organs to the brain and spinal cod MOTOR NEURON which conducts impulses from the brain and spinal to effector organ ASSOCIATION NEURON perform integrative functions of the nervous system

Answer 2

NCERT based Answer for Class 11 Biology Students

Types of neurons:

1. Multipolar: Neuron with one axon and many dendrites is called multipolar neuron. Most of the neurons in brain and spinal cord are multipolar.

2. Bipolar: Neuron with one axon and one dendrite is bipolar. Bipolar neurons occur in retina of eye and internal ear.

3. Unipolar: Cyton with only one process is unipolar. Unipolar neurons usually occur in embryonic stage.

4. Myelinated nerve fibers:

 These are enveloped with Schwann cells, which form a myelin sheath around axon.

 Gaps between two adjacent myelin sheaths are called nodes of Ranvier.

 Myelinated nerve fibers are found in spinal and cranial nerves.

5. Unmyelinated nerve fibers:

 These are enveloped with Schwann cells, which do not form myelin sheath around axon.

 These are commonly found in autonomous and somatic neural system.

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