Bone is the major storage site for calcium ions. What transport mechanism would be used to transport additional calcium ions from the bloodstream into the bone and why would only this method of transport work?

this protocol provides a detailed procedure for chromatin immunoprecipitation (chip) to study the dna-protein interactions.

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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its temperature is increasing. this causes molecular vibrations to increase.