Cell Transport Flashcards
Fluid mosaic model
Fluid: refers to the dynamic and flexible nature of the lipid bilayer
Mosaic: refers to the diverse arrangement of various components within the cell membrane. Such as the bilayer
simple diffusion
following concentration gradient by simply crossing in balance
Facilitated
Large molecules carried by protein
osmosis
water diffusion
concentration gradient
difference in the concentration of a substance across a space. This gradient drives the movement of molecules, typically from an area of higher concentration to an area of lower concentration.
ionic pumps
active transport of ions carried out by ionic pumps
endocytosis
when materials are brought into cell while spending energy
have two types
phago and pino
phagocytosis
cell engulfing large solid particles
pinocytosis
cell drinking - small droplets of liquid taken into cell
exocytosis
cell gets rid of particles vacoule fuses to the membrane and open up to the outside of cell
isotonic
Balanced transport follows concentration gradient and dynamic equilibrium
Hypertonic
too much solute outside cell attracting low concentrated water causing a deflation/dehydration
hypotonic
too much solute or high concentrated area inside cell so water tries to balance it swelling up causing increase in cell
How does Choesterol help with fluidity
Reducing fluidity at higher temperatures by restraining the movement of phospholipids, maintaining structural integrity.
How does Phospolipids help with fluidity
create kinks that prevent tight packing, increasing fluidity.
passive transport
no energy
-simple
-facillitated
-osmosis
active transport
with energy
-ionic pumps
-endosymbiosis
-exocytosis
