Question

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

(a) The nerve impulse travels from the dendritic end towards the 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 answer 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.

• Chemicals or neurotransmitters are released at axonal end not on dendritic end.
• (Hence statement b) is incorrect.