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Cell Memb. Transport

QuestionAnswer
Cell Membrane A cell structure that controls which substances can enter or leave the cell.
Carrier Proteins Can be used for either active or passive transport.
Channel Proteins Always used for passive transport.
Cell Membrane Transport The movement of particles across a cell membrane, which is essential for cellular life.
Pinocytosis A process by which extracellular fluid is engulfed by invaginating cell membranes, forming a vesicle that then separates from the membrane.
Simple Diffusion A type of diffusion that does not rely on membrane proteins for transport.
Ion Channels Specialized proteins in the plasma membrane that provide a passageway through which charged ions can cross the plasma membrane down their electrochemical gradient.
Hydrophilic A polar molecule that selectively associates itself with water through hydrogen bonds.
Exocytosis The process by which cells move materials from within the cell into the extracellular fluid.
Endocytosis A process whereby cells internalize membrane proteins such as receptors and solutes, from the extracellular space by engulfing them within plasma membrane vesicles.
Peripheral Proteins A protein that is found temporarily attached to the cell or mitochondrial membrane.
Passive Transport The movement of ions and molecules along the concentration gradient without the application of any external energy.
Osmosis The movement of water molecules across a membrane from an area of high water concentration to an area of a lower concentration.
Diffusion The movement of molecules from an area of high concentration of the molecules to an area with a lower concentration.
Ficilitated Diffusion A type of passive transport that uses specialized proteins, such as channel proteins and carrier proteins, to help molecules move across a cell membrane.
Active Transport An energy-driven process where membrane proteins transport molecules across cells.
Created by: user-1832640
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