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CELL MEMBRANE 1.3 - Coggle Diagram
CELL MEMBRANE
1.3
OSMOSIS
the net movement of water from an area of high water potential to an area of low water potential
water potential = tendancy of water to leave a system via osmosis
HYPOTONIC = low solute - high water potential
HYPOTONIC = high solute - low water potential
ISOTONIC = equal
PLASMOLYSIS
membrane pulled away from cell wall
water leaves cell in hypertonic solution
mass decreases
ACTIVE TRANSPORT
requires ATP- made by mitochondria
moves molecules against concentration gradients
used carrier proteins
(learn what graph looks like)
FACILITATED DIFFUSION
passive transport of molecules down a concentration gradient using proteins
does not require ATP
can move large molecules
can move charged ions via channel protein
SIMPLE DIFFUSION
net movement of molecules from an area of high concentration to low concentration
the rate is influenced by:
tempertaure
molecular size
gradient steepness
does not need ATP
PROTEINS
CHANNEL
open on both sides of membrane
can create polar environment in the middle for charged ions
CARRIER
has specific shape for one molecule
changes shape to allow molecule out the other side
example: glucose (large molecule, cannot diffuse)
CO-TRANSPORT
sodium ions move down a concentration gradient and take glucose with it up a concentration gradient
still passive