Which of the following statements best explains how the cell membrane regulates what goes in an out of the cell? a) the membrane allows only certain molecules to move into the cell b) the membrane destroys most molecules so that they do not enter the cell c) the membrane changes only certain molecules into ions before they move into the cell d) the membrane allows most molecules to transfer energy to the cell without entering the cell

The statement "The membrane allows only certain molecules to move into the cell" explains how the cell membrane regulates what goes in an out of the cell.

Option A

Explanation:

Cell membrane is a protective wall between intracellular and extracellular environment. It acts as regulator to decide what may enter or exit the cell and medium for transportation of materials necessary for survival. This movement can be passive (without cellular energy need) or active (cell need to expand energy for transfer).

It balances cell potential thus cell membrane play role of selective filter.  As they are selectively permeable permits fat-soluble or hydrophobic molecules and gases, such as oxygen and carbon dioxide, they can quickly send out via the membrane.

relations between the soviet union and the united states were driven by a complex interplay of ideological, political, and economic factors, which led to shifts between cautious cooperation and often bitter superpower rivalry over the years. the distinct differences in the political systems of the two countries often prevented them from reaching a mutual understanding on key policy issues and even, as in the case of the cuban missile crisis, brought them to the brink of war.

the united states government was initially hostile to the soviet leaders for taking russia out of world war i and was opposed to a state ideologically based on communism. although the united states embarked on a famine relief program in the soviet union in the early 1920s and american businessmen established commercial ties there during the period of the new economic policy (1921–29), the two countries did not establish diplomatic relations until 1933. by that time, the totalitarian nature of joseph stalin's regime presented an insurmountable obstacle to friendly relations with the west. although world war ii brought the two countries into alliance, based on the common aim of defeating nazi germany, the soviet union's aggressive, antidemocratic policy toward eastern europe had created tensions even before the war ended.

the growing interconnectedness of the world through communication, trade, and the exchange of ideas is an important theme in the history of the 20th and 21st centuries.

explanation: