Study the illustration. The small blue spheres represent water molecules. In which direction will water molecules move across the membrane?

Water will move from B to A.

There will be no net movement of water.

Water will move from A to B.

Water will move from A to B

Explanation:

Due to higher concentration of water at B than in A.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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