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plasma membrane - Coggle Diagram
plasma membrane
membrane transport
passive
Simple diffusion
small, non pollar
move between phospholipids without help
O2, CO2
down the concentration gradient
Facilitated diffusion
bigger, pollar
move with help of proteins
channel mediated
ions or small molecules move through water-filled proteins
gated channel
stimulous to open
leak channel
always opened
carrier mediated
small polar molecules
protein changes shape
osmosis
movement of water through selectively permeable channels (aquaporins)
No energy needed
active
does need energy
active transport
against conccentration radient
primary active transport
ion pumps move ions against raident
phosphate is connected (ATP) chnages shape
secondary active transport
a substance is is moving against cincentration radient gives energy so another moves with the concentration radient
antiport: different directions
symport: same direction
needs ATP
ATP+O2=ADP+P3 (phosphate is created)
vesicular transport
transport by vesicles
larger particles
exocytosis
From inside to outside of cell
endocytosis
From outside to inside of the cell
phagocytosis
large particle is engulfed by newly formed vesicle
vesicle joins lysosome and this breaks it into molecules
"cell eating"
pinocytosis
folds inwards and gulfs dissoleved solutes or droplets used by cell
"cell drinking
receptor mediated
receptors catch molecules and then the membrane folds inwards and engulfs them
needs energy