QUESTION 6 The image below shows four membrane proteins found in the cell membra

Question

QUESTION 6 The image below shows four membrane proteins found in the cell membrane of axons Match the movement of sodium ions and potassium ions through each transport protein during depolarization. If no ions move through a transport protein at during depolarization, then select the "no ion movement" answer. Some answer choices will not be used at all outside cell a voltage-gated Na channel ? voltage-gated ? sodium-potassium non-gated K channel K channel pump inside cell voltage-gated sodium channel voltage-gated potassium channel sodium-potassium pump potassium channel (also called potassium leak channel and no ion movement B. sodium and potassium in C. sodium and potassium out D sodium in and potassium out . sodium out and potassium in non-gated potassium channel) sodium in G. sodium out potassium in potassium out

Explanation / Answer

1) During Depolarization the membrane potential rises from - 30mV to 70mV.. During this stage Sodium Channel Opens which allow the influx of sodium ions inside the membrane resulting in the change in the membrane potential.. Rest all the channels remain closed... !

2) During Reploarization sodium channels gets closed and only Potassium Channels open which allows the outflux of Potassium ions outside the membrane rest every channel gets closed no ions movement in other channels..

3) During resting potential all Sodium and Potassium Channels gets closed only Sodium - Potassium Pump opens which move 2 Sodium outside and 3 Potassium inside against the contration gradient using energy of the cell.. With that Potassium leaky channel are also open to allow the influx of Potassium inside the membrane to keep the potential negative..!!

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