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.
Answer and Explanation:
I believe you are referring to what happened to African Americans during the reconstruction of the south, when they were freed from slavery.
In that period, laws were established that prohibited African-Americans from being victims of discrimination and forced labor, although this still happened in society, especially episodes of discrimination. In addition, Africans have gained the right to vote, to be political representatives and to hold public office, as a reflection of their citizenship that was guaranteed through emancipation. Blacks could also participate in commerce, attend schools and own homes.
The financial crisis happened because banks were able to create too much money, too quickly, and used it to push up house prices and speculate on financial markets.
