What is the function of the mobile phase for developing a chromatogram?

The chromatography is the technique of separation of the components from a mixture. The chromatograph is referred to a visible record of the result of the chromatography.

The mobile phase is referred to the gas or the liquid which flows with a different rate on the stationary phase.  The mobile phase carries the components of the mixture. It is important for the separation of the components present in the mixture.

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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a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.