Question

A neuron that has only one axon but several dendrites is classified as a: a multipolar neuron b.bipolar c. Unipolar neuron d.multidendrutic neuron

Answer 1

Answer:

A neuron that has only one axon but several dendrites is classified as:

a. multipolar neuron.

Explanation:

• The neurons are the fundamental unit of the nervous system.
• The nervous system consist of only two types of cell; neurons and neuroglia.
• Neurons are specialized to respond to physical and chemical stimuli, conduct nerve impulse and release neurotransmitter , while the neuroglia supports , nourish and protect the neuron.
• Most neurons have three parts: a cell body, dendrites and axon.
• Neurons show a great diversity in size and shape, and are classified on the basis of structure and function.

On the Basis of structure the neurons are classified as: unipolar, bipolar and multipolar. (Multidendritic neurons are studied in Drosophilla and are reported to be a result of misexpressed gene)..

• Multipolar neurons are the most common type of neurons in the brain and spinal cord and have several dendritic processes and one axon.

• Bipolar neurons  are found in retina of the eye, in the inner ear and in the olfactory area of the brain and are characterized by one dendrite and one axon.
• Uni-polar neurons have single processes extending from the cell body which divide into two branches.

On the basis of function neurons are classified as; sensory, motor and association neurons.