Organisms that can produce their own food and feed themselves are called

Autotrophs

Explanation: Autotrophs are organisms that often produce their own food by using sunlight, carbon dioxide, and water to form sugars which they can use for energy.

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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