Sequencing the Events of Repolarization Sequencing the Events of Repolarization

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Sequencing the Events of Repolarization

Sequencing the Events of Repolarization Complete each statement by using the appropriate word or phrase from the list. Then place the statements in the order of an action potential repolarization event. Drag the text blocks below into their correct order As the membrane potential sodium channels begin closing which in turn reduces the sodium movement to the ICF. ,the voltage-regulated voltage-regulated sodiunm rises toward zero Through the activated channels, causing the membrane to repolarize back towards RMP. now flows outwards potassium With a larger duration of activation than sodium channels, the potassium channels allow for a greatermovement of potassium to the ECF causing a short period of sodium hyperpolarization With membrane potentials approaching +35 mV, the channels become fully activated voltage-regulated potassium

Explanation / Answer

As the membrane potential rises towards zero, the voltage regulated sodium channels begin closing which in turn reduces the sodium movement to the ICF.

Through the activated channels potassium now flows outwards causing the membrane to repolarization back towards RMP.

With a larger duration of activation than sodium channels, the potassium channels allow for a greater movement of potassium to the ECF causing a short period of hyper polarization.

With membrane potentials approaches + 35mV, the voltage regulated sodium channels become fully activated.

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