Describe the history of fingerprints. how can iphone distinguish the difference between our fingerprints? to answer this question, think about the characteristics of fingerprints and the major types.

Our fingerprints are like our own dna that makes up our identity. Our fingerprints are like a serial code which can be scanned like the iPhone.

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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the sphincter muscles at the end of the digestive tract is the anus.