Which membrane potential occurs because of the influx of na+ through chemically gated channels in the receptive region of a neuron? a)excitatory postsynaptic potential b) resting potential c) action potential d) inhibitory postsynaptic potential.

The correct answer is c) action potential

Explanation:

Action potential starts with the opening of the sodium channel in response to the stimulus given to the neuron by neurotransmitter. This opening of sodium ion channel results in the influx of sodium ions in the receptive region of neurons from outside. This is the depolarization step of action potential.

Before this step, the neurons are negatively charged from inside and positively charge outside and this stage it is considered to be resting stage.

As the amount of Na⁺ reaches the threshold value the action potential fires and send the electric signals down to axons.  

Therefore action potential occurs because of the influx of Na⁺ ions through chemically gated channels in the receptive region of a neuron.

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