transport in and out of cell Flashcards
(15 cards)
what are 3 methods of transport into the cell?
simple diffusion, facilitated transport and vesicular transport.
simple diffusion
the movement of particles from a high concentration to a low concentration until they are evenly distributed
what happens if there is a high concentration rate
faster rate of diffusion, the particles want to get away from each other
what is osmosis
the movement of water molecules across a semipermeable membrane from a high concentration to a low concentration
what happens to the rate of diffusion if the particles are smaller
faster rate of diffusion
what is osmosis active
water molecules will cross a semipermeable membrane to have equal dilution on either side
what is facilitated transport
water soluble molecules must pass through proteins
what molecules can pass straight through the membrane
fat soluble molecules
what are channel proteins
provide a way for hydrophilic elements to travel across the membrane without coming into contact with hydrophobic tails
what are carrier proteins
binds molecules and transport them across the membrane
what is vesicular transport
the movement of substances across the membrane in membrane bound sacs (vesicles)
endocytosis
taking materials into the cell by vesicular transport
phagocytosis
taking solids into the cell by completely surrounding the particle and pinching off
pinocytosis
taking fluids into the cell by surrounding the droplet until it pinches off
exocytosis
when contents of vesicle are passed to the outside of there cell
