When there is a GREATER concentration of solute molecules OUTSIDE the cell than inside.
When there is a GREATOR concentration of solute molecules INSIDE the cell than outside
When there is the SAME concentration of solute molecules on the inside and the outside
The SWELLING AND BURSTING of animal cells when water enters
happens when a cell is placed in a
What organelle [that plants have that animals don't] keeps plant cells from
bursting in this condition?
The SHRINKING of plant cells when water leaves so the cell membrane pulls
away from the cell wall or shrinking of animal cells happens when a plant cell is
placed into a
Cells stay the same size when placed in an
isotonic solution because the amount of water
leaving the cell is the same and the amount of water entering.
When the concentration of solute inside & outside a cell is the same, the cell has reached
When molecules move DOWN the concentration gradient it means they're moving from
HIGH to LOWER concentration
D_I F F U S I O N
moves oxygen and carbon dioxide molecules from a high concentration to
a low concentration across membranes.
A small membrane sac used to transport substances during exocytosis & endocytosis
V_A C U O L E (vescicle would also work - but didn't fit in the spaces)
A cell placed in an _I_S O T O N I C solution
neither swells or shrinks because the
concentration of molecules outside the cell is the same as inside.
A solution in which there is a HIGHER concentration of molecules OUTSIDE the cell than
What forms whenever there is a difference in
concentration between one place and another.
A CONCENTRATION _G_R A D I E N T
When molecules move from high to low along a concentration gradient we say they are
DOWN THE GRADIENT
condition plant cells require
[otherwise the cell shrinks away from the membrane and the plant wilts]
Hypertonic: Cell shrinks away from cell wall
Hypotonic: The cell swells against the cell wall
Isotonic: the cell stays the same
Transport protein that provides a tubelike opening in the plasma
membrane through which particles can diffuse
Particle movement from an area of higher concentration to an
area of lower concentration
Particle movement from an area of lower concentration to an
area of higher concentration
factors that affect the rate of diffusion
- temperature [increase temp, increase diffusion bc particles speed up]
- shape [some particles can move by simple diffusion, some can move through
protein channels, and some have to move by ion carriers or by endo/exo-cytosis]
- concentration [increase concentration, increase diffusion]
- charge [no charge diffuses easily, charged particles do not]
- solubility [if a substance not soluble...it often won't diffuse in certain solvent]