Question

A bipolar neuron has ____________
A. Two axons and two dendrons
B. One axon and one dendron
C. Two axons and one dendron
D. One axon and two dendrons

Answer 1

Hint: Neurons are also called nerve cells. Neurons are the structural as well as the functional unit of the neural system or nervous system. On an average, the human brain is made up of more than 100 billion neurons. Similarly, other parts of the neural system, whether of CNS or of PNS, are structurally made up of a large number of neurons.

Complete answer:
There are many different types of neurons present on the basis of the number of axons and number of dendrites, one such type Is Bipolar neuron. Bipolar neuron has two processes.

1.Two axons and two dendrons : this type of neuron can never exist. No neuron can have two axons.
2.One axon and one dendron : The bipolar neurons are one which have one axon and one dendrite. As also pseudo unipolar neurons they have a cell body on the side branch of the main axon.
3.Two axons and one dendron :- this type of neuron is termed as a unipolar neuron. It consists of one axon and one dendrite. These neurons receive signals and transmit them.
4.One axon and two dendrons : it is termed as multipolar neurons. This contains one axon always but multiple dendrites. They are found in the central nervous system.

Hence, the correct answer is option (B)

Note: Neurons help to transmit the nerve impulse to the brain. Pseudo unipolar neurons are actually bipolar neurons as bipolar neurons also have one axon and one dendrite and two polar. And pseudo unipolar neurons also have one axon and one dendrite.