Cell Transport Flashcards
Plasmolysis
contraction of the protoplasm in a living cell when water is removed by exosmosis. When it shrivels
Cytolysis
the dissolution or degeneration of cells. When it bursts.
Osmosis
The diffusion of water across a cell membrane. ONLY WATER.
Turgor Pressure
Also called hydrostatic pressure the pressure exerted on a plant cell wall by water passing into the cell by osmosis
Pinocytosis
Very small particles
Endocytosis
The process of things going into the cell.
Exocytosis
The process of materials leaving the cell.
Passive Transport
transport of a substance across a cell membrane by diffusion; expenditure of energy is not required
Diffusion
Example: when air fresheners defuse into the room.
Concentration Gradient
the gradual difference in concentration of a dissolved substance in a solution between a region of high density and one of lower density.
Phagocytosis
Very large particles.
Sodium potassium pump
The process of materials entering and leaving the cell.
Carrier Protein
A protein that transports substances across a cell membrane.
Facilitated diffusion
Transport of substances through a cell membrane along a concentrations gradient with aid of carrier proteins.
Ion channel
A complex of protein molecules in a cell membrane that form a pore through which ions can pass.