Question

Which of the following statement about a transmission of a nerve impulse is correct?

• A. Nerve impulse travels from dendritic end towards axonal end.
• B. A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells.
  
• C. The chemicals released from the axonal end of one neuron cross the synapse and generate a similar electrical impulse in a dendrite of another neuron.
• D. All of the above.

Answer 1

The correct option is D All of the above.

For nerve impulses to be generated and carried, nerve cells should be in contact with each other. The nerve impulse is transmitted in the following sequence:
Axon end- synapse- dendrites- dendron- cyton- axon body- axon end. A nerve impulse travels in a form of electrical charge from axon end to the synapse. Here, the electrical impulse is converted to the chemical impulse in the synaptic cleft. Further this nerve impulse flows from synaptic cleft to dendritic tips, converting the chemical impulse to electrical impulse. Thus, the flow of impulse always flows from one axonal end of a neuron to another dendronal head of a neuron. So, the correct answer is option D.