Choose an animal, briefly describe it (physical description, habitat, etc.). Then, list all the organ systems of the animal. From this list, choose one organ system to describe in detail. Describe how the whole system works and functions. Include the function of every organ involved in that organ system. Use at least 500 words for your answer.

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.  

read more on -

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation: