A force away from you.

yo

I don't exactly know what you mean.

but I guess this will help.

Contact forces involve push. Contact forces involve push, pull and friction. A contact pull and friction. A contact force is when two interacting objects are physically touching, for example: when you are throwing a ba throwing a ball you are using a contact force.

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

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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