This is my last question

water molecules are positively charged on one end and negatively charged on the other. what does this property allow water to do?
a. be used as nutrients instead of food
b. replace damaged brain cells
c. dissolve wastes and nutrients
d. create new bones and muscles

dissolve wastes and nutrients

Explanation:

Water is a bipolar solvent. the polar arrangement of oxygen and hydrogen atoms allows water to have a positive electrical charge and a negative charge. This allows the water molecule to become attracted to many different types of molecules.  Through this attraction, water can become so heavily attracted to disrupt the attractive forces that hold the compounds and, thus, dissolving them.

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.  

read more on -