cell membrane, Controls what enters and exits a cell, phospholipid, component of a cell membrane. They are organised in rows and have a head and a tail. , protein, component of a cell membrane. They are randomly located throughout the cell membrane. , selectivelypermeable, Feature of the cell membrane which means it only allows certain molecules to pass through it. , two, How many layers of phospholipids make up a cell membrane?, passive transport, type of transport across membranes that does not cost energy, diffusion, transport method where molecules move DOWN a concentration gradient, starch, large molecule that cannot pass across a cell membrane, glucose, molecule that moves into a cell by diffusion.

Cell Membrane Structure and Function

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