Say whether the following diagrammatic representation is true or false. Give reason
Na-
Na Na+
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In a resting neuron the resting potential is -70 mV, this means that the inside of the neuron is negatively charged.The neuronal membrane is more permeable to K+ ions and less permeable to Na+ ions. The Na
+
- K
+
pump tries to balance the negative charge by pumping 3 Na
+
ions inside and 2 K
+
ions outside.When neurons receive signal, an action potential is generated and depolarization of membrane occurs. Resting membrane potential is pushed towards 0 mV. When depolarization reaches -55 mV the action potential is fired by neuron.This means outer surface still remains positively charged.
Therefore the last statement is wrong.
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