Answer: The sodium-potassium pump.Explanation:
The concentration of sodium and potassium inside and outside the muscle cells are important in the regulation of contraction. These concentrations differ when a muscle is relaxing or contracting.
<span><span>Contraction: potassium concentrations are higher outside the cell than inside the cell.</span><span>Relaxation: the potassium concentrations are higher inside the cell than outside the cell.</span></span>
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4. When visiting other countries and doing research about them, so you’d know how it’d affect you.
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Answer:
That would be the definition of osmosis
Helium could hold 2 neutrons in its nucleus.