Simple definition
Active Transport
Concentration Gradient
Endocytosis
Equilibrium
Exocytosis
Facilitated Diffusion
Homeostasis*
Hydrophilic
Hydrophobic
Hypertonic
Hypotonic
Isotonic
Membrane Proteins
Osmosis
Passive Transport
Phospholipid
Phospholipid Bilayer
Semipermeable
Simple Diffusion
Solute
Solvent
Tonicity
Active Transport: A cellular process that requires energy to move molecules across a cell membrane against their concentration gradient.
Concentration Gradient: The difference in concentration of a substance across a membrane.
Endocytosis: The process by which a cell takes in molecules or particles by engulfing them in a vesicle formed from the cell membrane.
Equilibrium: A state of balance or stability reached when the concentration of a substance is equal on both sides of a membrane.
Exocytosis: The process by which a cell releases molecules or particles by fusing a vesicle containing them with the cell membrane.
Facilitated Diffusion: A type of passive transport in which molecules move across the cell membrane with the help of membrane proteins.
Homeostasis: The ability of an organism to regulate and maintain internal conditions within a narrow range despite external changes.
Hydrophilic: Attracted to water.
Hydrophobic: Repelled by water.
Hypertonic: A solution with a higher concentration of solutes than another solution.
Hypotonic: A solution with a lower concentration of solutes than another solution.
Isotonic: A solution with the same concentration of solutes as another solution.
Membrane Proteins: Proteins embedded in the cell membrane that help transport molecules in and out of the cell.
Osmosis: The movement of water molecules across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration.
Passive Transport: The movement of molecules across a cell membrane without the input of energy.
Phospholipid: A type of lipid molecule that forms the basic structure of the cell membrane.
Phospholipid Bilayer: The double layer of phospholipid molecules that makes up the cell membrane.
Semipermeable: Allowing only certain substances to pass through.
Simple Diffusion: The movement of molecules from an area of high concentration to an area of low concentration without the need for energy.
Solute: A substance that is dissolved in a solvent.
Solvent: A substance in which solutes are dissolved to form a solution.
Tonicity: The relative concentration of solutes in two solutions separated by a membrane.