The diagram shows the membrane potential changes during an action potential (left) and associated ionic movements and channel states (right). Based on your understanding of neuronal physiology, select all correct statements:

P.S: This is a multi-select question, but each incorrect answer has a negative marking of 0.25 marks.

Question

The diagram shows the membrane potential changes during an action potential (left) and associated ionic movements and channel states (right). Based on your understanding of neuronal physiology, select all correct statements: 
 
 P.S: This is a multi-select question, but each incorrect answer has a negative marking of 0.25 marks.

Answer

During the rising phase of the action potential, voltage-gated Na⁺ channels are open and Na⁺ ions enter the neuron.

Answer

During the absolute refractory period, another action potential can be generated, but only with a larger-than-normal stimulus.

Answer

The membrane potential at the peak of the action potential approaches closer to the equilibrium potential of Na⁺, as Na⁺ permeability is highest at that point.

Answer

Hyperpolarization is only dependent on the inactivation loop of sodium channels, which allows excess K⁺ to exit the cell beyond the resting potential level.

Answer

The sodium-potassium pump (Na⁺/K⁺ ATPase) is responsible for returning the membrane to resting potential post hyperpolarization.

Answer

The repolarization phase is primarily due to the opening of voltage-gated Na⁺ channels and the influx of Na⁺ ions into the cell.

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The diagram shows the membrane potential changes during an action potential (le...

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