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biology 9

passive and active transport

QuestionAnswer
what is passive transport? passive transport is the movement of substances across a cell membrane without the use of cell energy
what is active transport? the movement of a substance across a cell membrane which uses ATP energy
what are some examples of passive transport? passive transport consists of simple diffusion, osmosis, and facilitated diffusion
what dose active transport consist of? active transport consists of two things endocytosis (enter) and exocytosis (exit)
what is endocytosis? the process in which cell ingest (take in) outside fluid and other large bulk particles
what is exocytosis? when a vesicle fuses with the cell membrane and releases its contents out of the cell (increases the size of the cell)
what is simple diffusion? the gradual mixing of two or more small substances by random motion
what is osmosis? the diffusion of water across a membrane
what is facilitated diffusion? when large substances move across the membrane through protein carriers
what is an isotonic solution? 2 solutions that have equal concentration the cell is at an equalliberum
what direction dose osmosis move? osmosis moves from a high to a low concentration
what is osmotic pressure? the pressure that water molecules exert against the cell membrane (causes the cell to swell/ shrivel
what is an hypertonic solution? a solution with a higher concentration which causes water to move out of the cell
what is an hypotonic solution? a solution with a lower concentration (causes water to move in) cell swells
what is a equilibrium when the molecules of two substances are evenly spread out in a solution
Created by: Austin33
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