Identify the properties of water that are important for life to be able to exist

Hydrogen bonding accounts for most of the unique properties of water. The unique properties of water include the ability to dissolve many substances,cohesion and adhesion, the ability to absorb a relatively large amount of energy as heat, the ability to cool surfaces through evaporation, and low density of ice.

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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sorry, but you do not have posted the diagram.