Which of the following reduces the consumption of raw materials? A. the use of energy efficient appliances
B. the use of smaller automobiles
C. recycling plastics, glass, aluminum, and paper
D. all of these

D. All of the above

Explanation:

Recycle, reduce, reuse (remember that when thinking of RAW materials)

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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wait any answer choices plz