Check sibling questions
Class 10
Chapter 7 Class 10 - Control and Coordination

Why is the flow of signals in a synapse from the axonal end of one neuron to the dendritic end of another neuron but not the reverse?

 

Answer

STRUCTURE OF NERVE CELL NEURON - Teachoo.jpg

  • In nerve cells signals go from;

Dendrites → Soma → Axon → Nerve endings → Synapse → Dendrite of next neuron

  • Signals are in the form of electric impulses as they pass from dendrites to nerve endings .
  • Signals are in the form of chemicals called neurotransmitters during transmission of messages across the synapse .
  • The chemicals called neurotransmitters are not present in the dendrites, they are only present in the axon. 
  • So, the dendrites cannot convert electrical impulses to chemical impulses . Thus the flow of signals in a synapse is from the axonal end one one neuron to the dendritic end of another neuron but not the reverse.

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Transcript

STRUCTURE OF NERVE CELL/ NEURON Dendrite Soma Neurotransmitters Axon Nucleus Synapse gap Nerve ending

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CA Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Economics, Accounting and English at Teachoo