Q4.8. Which statement below is TRUE about the voltage-gated Na* channels during the action potential? The voltage-gated Na* channels are open the entire time that the neuron is depolarized (when Vm is above resting potential). The voltage-gated Na* channels open after the voltage-gated K* channels. The voltage-gated Na* channels open to restore V to the resting potential after the action potential m peak. The voltage-gated Na* channels are open when Vm is rapidly increasing during the action potential.

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.