Chapter 3-Transport Flashcards
Diffusion
Movement from high to low on concentration gradient
Facilitated diffusion
Movement from high to low with help of carrier protein
Osmosis
Diffusion of water
Isotonic
Same amount of material inside and outside cell, doesn’t change shape
Hypertonic
Less water outside cell, shrinks
Hypotonic
More water outside cell, swells
Cytolysis
Cell bursts due to a hypotonic solution
Turgor pressure
Pressure against cell wall (hypertonic=decrease, hypotonic=increase
Active transport
Movement from low to high concentration, against gradient, uses energy
Exocytosis
Transports bulk material out of cell (exo-exit)
Endocytosis
Bring materials in cell (endo-into)
Phagocytosis
Cell eating
Pinocytosis
Cell drinking
Receptor-mediated endocytosis
Very specific, proteins pick up specific molecules surrounding them