1. How does the cell membrane affect homeostasis (i.e., actively maintaining a stable internal environment) in the cell? (select ALL accurate statements) A) the cell membrane prevents charged ions, and (most) large, polar molecules from entering B) the cell membrane allows some molecules to enter freely C) the cell membrane prevents nonpolar molecules from entering the cell D) the cell membrane is a selective barrier 2. The cell plasma membrane has integral and peripheral proteins in the phospholipid bilayer. These proteins may be bound to ____. (select ALL correct answers) A) ribososomes B) proteins embedded in a neighboring cell plasma membrane C) cytoskeletal elements in the cell interior D) extracellular structures