An archived questions was, "one serving of a particular food contains 16g of carbohydrates, 2g of protein, and 10 g of fats. approximately how many calories does it contain? " the archived answer was 300 calories.  how did you get this answer? shouldn't it be 162? (9 cal * 10g fat) + (4 cal * 16g carb) + (4cal * 2g protein)

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 "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this