Chapter 3 discussed cell structure and functions, and Chapter 4 discussed the organization and function of the human body. When
viewed together, this implies the functions of the human body are dependent upon cellular activity. Explain why this would be correct. An important cellular structure is the cell (plasma) membrane. Identify and explain a specific function of the cell membrane that you feel is the most important in achieving homeostasis.
The cell membrane has a major role in achieving homeostasis, that being as follows: The cell membrane has two layers that do not allow the transfer of water and ions. This makes possible the fact that cells concentrate more sodium ions outside the cell. The cell membrane also performs the task of pumping water in and out, thus affecting the concentration of the cytosol. To conclude, thanks to the cell membrane, cells can adjust to changing temperatures.
The Treaty of Tordesillas neatly divided the “New World” of the Americans between the two superpowers. Spain and Portugal divided the new world by drawing a line in the Atlantic Ocean, about 370 leagues west of the Cape Verde Islands, then controlled by Portugal.
