Plasma Membrane

• The plasma membrane plays a role in cell recognition, allowing cells to identify and interact with other cells.
• Cholesterol helps maintain fluidity by preventing excessive packing of lipid molecules.
• Phospholipids are amphiphilic molecules with hydrophobic tails and hydrophilic heads that form the bilayer structure of the cell membrane.
• The plasma membrane is composed of phospholipids, cholesterol, proteins, carbohydrates, and glycolipids.
• Active transport is a process that requires energy and allows molecules to move against their concentration gradient, from an area of lower concentration to an area of higher concentration.
• Osmosis is a passive transport process that allows water molecules to move from an area of lower solute concentration to an area of higher solute concentration.