Answer: B
Explanation: Cell Membrane Controls The Movement Of Materials into and Out Of The Cell
B)2 cell membrane structure regulates the movement of substances in and out of the plant cell.
The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semi-permeable. The cell membrane regulates the transport of materials entering and exiting the cell.
The cell membrane controls what moves in and out of the cell. Cell membranes only allow some solutes (solids) to move across it. Movement across the membrane depends on size and type of the solute (solid).
The plasma membrane
The plasma membrane can be described as a phospholipid bilayer with embedded proteins that controls the passage of organic molecules, ions, water, and oxygen into and out of the cell. Wastes (such as carbon dioxide and ammonia) also leave the cell by passing through the membrane.
In facilitated diffusion, substances move into or out of cells down their concentration gradient through protein channels in the cell membrane. Simple diffusion and facilitated diffusion are similar in that both involve movement down the concentration gradient.
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