Question

why is flow of signals in a synapse from axonal end of one neurone but not the reverse ?
please answer fast

Answer 1

Due to the phenomenon of Biomagnification , due to which ddt goes on increasing on higher trophic levels . From phytoplanktons which got it accumulated( from polluted water ),to zooplanktons ,fish,and finally to human being.As it can't be digested and excreted it goes on accumulating.

Answer 2

When an electrical signal reaches the axonal end of a neuron, it releases a chemical substance. ... Hence, the electrical signal is converted into a chemical signal at the axonal end. Since these chemicals are absent at the dendrite end of the neuron, the electrical signal cannot be converted into chemical signal

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