why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reversed?
Answers
Question: Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?
Answer: As the electrical impulse reaches the axon terminal in the region of axon-dendrite synapse, it stimulates the exocytosis of vesicles containing. . neurotransmitter. Neurotransmitter attaches to the chemoreceptor sites of the membrane covering the dendrite end of synapse. It creates a new impulse that travels through cell body and sxon of the second neuron. At synapse, the axon end does not contain any chemoreceptor sites so that reverse flow of electrochemical impulses is not possible.
Question: why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reversed?
Answer: The gap between two neurons is known as synapse . This gaps serves as a link between two neurons. The information from the first neuron reaches the terminal ending. There a chemical named neurotransmitter is released. It crosses the gap and starts a similar electrical impulse in the dendrite end of the second neuron . The dendrite end of the second neuron can only collect information but cannot reverse it to the first neuron .
This is because at the axon end of second neuron, there is no presence of chemoreceptor, so the reverse flow of information is not possible.