How does atp release energy that can be used by living cells?

by hydrolysis

Explanation:

ATP is referred to as Adenosine Tri Phosphate. It is the energy currency of every living organism.

Organisms derive energy from ATP through the hydrolysis of the third phosphate group of the compound.The reaction happens through the addition of water and leads to the release of one of the phosphate groups.

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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