Question

Which of the following statements about the transmission of the nerve impulse is incorrect?

• A. Nerve impulse travels from dendritic end towards axonal end.
• B. At the dendritic end, electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron.
• 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. A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells.

Answer 1

The correct option is B At the dendritic end, electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron.

The nerve impulses are generated at the sensory receptor and are carried towards the CNS through the sensory neuron. The nerve impulse is transmitted through the axon of one neuron to the dendrite of the other neuron. At the axonic end, there are telodendrons which release the neurotransmitters which flow through the synapse to the dendrite of the other neuron.

Thus, the correct answer is option B.