Na/K concentration in and out of the cell at the homeostatic level. It does this by pumping sodium and potassium ions in and out when it's needed of it in order to maintain the concentration of both ions stable across time. 
        
             
        
        
        
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One major source of disagreement between Booker T. Washington and W.E.B Dubois was whether or not to use force as a means of racial integration. Washington believed that people of African race should learn to fit in with the whites (by exceding in work), whereas Dubois believed that riots and sit-ins were necessary to diminish racial inequality. 
Explanation:
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<span>The great expansion of overseas trade during the 16th century, largely a result of voyages of discovery, favored the Atlantic coastal ports. A consequence was the decline of the trading cities of northern Italy.
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It made the Himalayas my bro