Q) Give possible reasons for the unidirectional transmission of impulse across a synapse
Main points | |
Key idea: | Synaptic transmission is unidirectional |
· Reasons : (i) Nerve impulses travel only in one direction along axon of pre-synaptic neurone due to refractory period (ii) Ca2+ channels & vesicles containing neurotransmitters only found in synaptic knob of pre-synaptic neurone but absent in post-synaptic neurone ; hence, neurotransmitters can only diffuse a/x synaptic cleft in one direction (iii) Receptors only found on post-synaptic side of synapse | |
Comments: (i) Visualize the answer with the aid of a labelled diagram. (ii) Verbalize the answer + write down the main points w/o referring to the answer (use abbreviations) (iii) Read again within the next 24h & once more within 72h (do not spend more than 10min) | |
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