Which scientific law states that for every action there is an equal and opposite reaction? Law of universal gravitation
Law of conservation of mass
Newton's first law of motion
Newton's third law of motion

Newtons third law of motion.

Explanation:

Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects.

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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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d) center of the mid-ocean ridge

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