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?
What type of cell, animal or plant, bursts when in a hypotonic solution?
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.
The substance that dissolves to make a solution is called the
During diffusion molecules tend to move
down/ the concentration gradient
When the concentration of solute inside & outside a cell is the same, the cell has reached
The diffusion of water across a selectively permeable membrane is called
Energy for active transport comes from a cell's
What type of transport requires energy from ATP to move substances across membranes.
All of the following are kinds of passive transport EXCEPT
When molecules move DOWN the concentration gradient it means they're moving from
HIGH to LOWER concentration
Active transport requires
ENERGY to move molecules across membranes
is the molecule that provides the energy for active transport.
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.
The cell organelles that burns glucose and provides ATP for active transport are the
Water moves across membranes by
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)
What type of transport does NOT REQUIRE energy.
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
A solution in which the concentration of molecules outside the cell is LOWER than inside
When molecules move from high to low along a concentration gradient we say they are
DOWN THE GRADIENT
WHAT TYPE OF pressure is caused by water inside a plant cell pushing against the cell wall
solution with a lower solute concentration (more water)
solution in which the solute concentration is the same
condition plant cells require
[otherwise the cell shrinks away from the membrane and the plant wilts]
condition that animal cells require
red blood cell bursts (cytolysis)
plant cells shrink (plasmolysis)
solution with a higher solute concentration (less water)
solution with a high water concentration
Hypertonic: Cell Shrinks
Hypotonic: The bursts & swells
Isotonic: Stays the same
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
Is used during active transport but not passive transport
Process by which a cell takes in material by forming a vacuole
Particle movement from an area of higher concentration to an
area of lower concentration
Process by which a cell expels wastes from a vacuole
A form of passive transport that uses transport proteins
Particle movement from an area of lower concentration to an
area of higher concentration
Transport protein that changes shape when a particle binds
protein ion pump
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]