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Transport in cells

TermDefinition
transport taking in and distributing materials across the cell membrane
active transport uses energy - has to go from an area of low concentration to high concentration (think walking into gym when everyone is coming out) - against the concentration gradient
passive transport no energy needed - high concentration to low concentration (think spraying perfume on one side of room and smelling it on other side after a while)
simple diffusion usually gases and other small molecules getting in and out of cell
facilitated diffusion molecule like glucose that needs help getting in and out - Protein with a channel through it
osmosis movement of water in and out of the cell
Phospholipid bilayer or fluid mosaic model terms for cell membrane
semi-permeable or selectively permeable cell membrane lets only certain things in and out of cell
phospholipids the layers that make up the cell membrane that have a head (glycerol) and a tail(fatty acid)
Hydrophobic hates water- the tail
Hydrophilic loves the water - the head
pinocytosis takes in liquids like drinking through a straw
phagocytosis takes in large things like bacteria by engulfing it like pac man
solubility dissolves in water
Hypertonic too much water goes out - looks like raisin( the salt water)
Hypotonic too much water goes in - cell will burst
Isotonic water equal inside and outside
endocytosis taking in large molecules like protein and starch - requires active transport
exocytosis pushing out molecules of waste through vesicle
cholesterol keeps cell membrane flexible(can bend)
dynamic equilibrium having equal amounts of a molecule inside and outside the cell
Created by: daday
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