BIO2(jasmin) Flashcards
Diffusion
involves the movement of molecules in a solvent from an area of
higher solute concentration to an area of lower solute concentration which
eventually results in the state of dynamic equilibrium.
after difussion this turn eventually results in the state
dynamic equilibrium.
passive
transport,no energy
required,movement of
molecules,
high to low
concentration,
state of dynamic
equilibrium
Simple Diffusion
Molecules such as ions and water
outside the cell are being
transported across the cell
membrane through channel
proteins via
facilitated diffusion.
The channel protein facilitates
the movement of molecules
hence the term
“facilitated diffusion”.
high
water
concentration to
one with lower
water
concentration.
osmosis
Movement is from
the region of high
water
concentration to
one with lower
water
concentration.
osmosis
is similar
to diffusion.
However,____-
refers to the
movement of water
from higher to
lower
concentration.
osmosis
relative concentration
of solutes in fluids
ability of a surrounding
solution to cause a cell
to gain or lose water
depends on the
concentration of
solutes
can be isotonic,
hypotonic, or
hypertonic
Tonicity
solute
molecules
outside the cell equals solute
molecules
inside the cell
Solutions of equal solute
concentration
Isotonic solution
is when water
molecules move at the
same rate in both
directions.
Isotonic solution
solute
molecules
outside the cell less than solute
molecules
inside the cell
has lower solute concentration and
has higher water concentration
Hypotonic solution
can cause the cell to
swell or even burst due
to the intake of water
more than the cell can
accommodate.
Hypotonic solution
solute
molecules
outside the cell is greater than solute
molecules
inside the cell
has higher solute concentration
and has lower water concentration
Hypertonic solution
can cause an animal
cell to shrink or shrivel
due to water loss.
Hypertonic solution
this do not change cell size that much varying concentrations of water.
Plant cells, relative to animal cells,
is an example of passive transport in which
molecules are moved across the membrane without
spending energy.
Diffusion
contains both the solute, which is usually
solid and a solvent, which is usually a liquid. A solute
added in a solvent will naturally diffuse to form a
solution.
solution
involves the movement of
molecules across the membrane but with the aid of
either channel or carrier proteins.
Facilitated diffusion
solution has a lower concentration of
solutes than inside the cell.
Hypotonic
solution is one with a higher
concentration of solute outside of the membrane.
Hypertonic
Hypotonic solution in plant cell
Turgid
Hypertonic solution in plant cell
Plasmolyzed
Isotonic solution in plant cell
Flaccid
