Inside the plasma membrane

• Plasma membrane - Controls what goes in and out of the cell
• Extracellular fluid - Outside of the cell
• Intracellular fluid - Inside the cell
• Homeostasis - Ability to maintain stable conditions in the body despite changes in the internal and external environment, to ensure proper functioning and overall health
• Membrane - Semi-permeable as it allows some molecules to cross but acts as a barrier to others
• Cholesterol - Fatty molecules that provides stability
• Proteins - Acts as a carrier for molecules that cannot pass through the plasma membrane
• Carbohydrates - Play a role in cell adhesion and recognition of hormones, antibodies, and viruses
• The plasma membrane is a semi-permeable boundary between internal and external environment
• Phospholipid bilayer - A double layer of phospholipids that forms the outer layer of the cell membrane

  
• Lipids are hydrophobic (water hating) while carbohydrates and proteins are hydrophilic (water loving)