Under normal conditions, action potentials are generated at the axon hillock of
ID: 200851 • Letter: U
Question
Under normal conditions, action potentials are generated at the axon hillock of a neuron and travel in one direction towards the synaptic terminals. Why are action potentials only transmitted in one direction under normal conditions? Note - Action potentials are not generated in the membrane of the cell body because there are few (if any) voltage-gated ion channels.] Na+ that flow into the axon during an action potential only move in one direction Voltage-gated Na+ channels cannot open again immediately after they close at peak membrane potential reversal during an action potential lons always move through open channels from higher concentrations to lower concentrations during an action potential Voltage-gated K+ channels close slowly after they open during an action potentialExplanation / Answer
option first is correct.
The cell body have channels for sodium which allows the transport of sodium inside the cell.
The sodium ions moves inside the cell body ane then migrates unidirectionally from cell body to pre axon. at the post exon region voltage gated sodium channels are present.
Voltage gated sodium channels opens only when a particular charge is acheived in a cell.
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