Passive transport
what is a concentration gradient
concentration between two areas is different
which way do molecules move
low concentration to high concentration
whcih way do molecules move
high to low
The cell membrane lets things in and out constantly. This is called being:
selectively permeable
Molecules move from
high to low concentration
which type of energy is used
ATP
what dictates the movement of water
the solute
Another name for the membrane and why it's called this
Fluid mosaic, it's fluid and has many different molecules
3 types of passive transport
simple diffusion, facilitated diffusion, osmosis
Does there always need to be a protein involved?
yes
which way does water move
from low solute to high solute
The membrane has a what bilayer? describe the components of the individual pieces
in facilitated transport, does it always need a channel?
no, can use transport protein
Purpose of exocytosis
transport to the extracellular environment, from golgi to plasma membrane
a cell is placed in a solution with the same concentration of water and solute as the inside of the cell. which type of solution is this?
isotonic
which bonds make up the plasma membrane and why
hydrogen bonds, weak
Cl-, a small atom, needs to be transported. which mechanism will it use?
Facilitated, charge
purpose of endocytosis
move things into the cell, from membrane to lysosome
a plant cell is placed in a salty solution. where will water go and what will happen to the cell?
water will chase the salty solution (hypertonic). the plant cell will shrink
the rate of diffusion depends on
size, polarity, charge