diffusion across a cell membrane is also called this; and only allows certain molecules to pass through the membrane

the carrier proteins that serve in active transport are often called this because they move substances from lower to higher concentration

sodium potassium pump

1 example of active transport in animal cells involves a carrier protein known as this

some substances can cross the cell membrane without any input of energy by the cell in this process

the movement of molecules from an area of higher concentration to an area of lower concentration

concentration gradient

difference in concentration of molecules across a distance

the concentration of molecules will be the same throughout the space the molecules occupy

water molecules diffuse from an area of higher concentration to an area of lower concentration

when the concentrations of solutes outside and inside the cells are equal, the outside solution is said to be this

the reason that plants wilt if they don't receive water is because the cell shrinks away from the cell walls and turgor pressure is lost. this is called:

facilitated diffusion

a type of passive transport; this process is used for molecules that cannot readily diffuse through cell membranes, even when there is a concentration gradient across the membrane

in facilitated diffusion, the movement of these kinds of molecules across the cell membrane is assisted by specific proteins in the membrane. the proteins are known as this

a type of transport involves membrane proteins known as this

in many cases cells must move materials from an area of lower concentration to an area of high concentration or "up" their concentration gradient. this movement of materials is known as

the process by which cells ingest external fluid, macromolecules and large particles including other cells

a pouch pinches off from the cell membrand and becomes a membrane bound organelle

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Biology

test #5

Term	Definition
simple diffusion	diffusion across a cell membrane is also called this; and only allows certain molecules to pass through the membrane
cell membrane "pump"	the carrier proteins that serve in active transport are often called this because they move substances from lower to higher concentration
sodium potassium pump	1 example of active transport in animal cells involves a carrier protein known as this
passive transport	some substances can cross the cell membrane without any input of energy by the cell in this process
diffusion	the movement of molecules from an area of higher concentration to an area of lower concentration
concentration gradient	difference in concentration of molecules across a distance
equilibrium	the concentration of molecules will be the same throughout the space the molecules occupy
osmosis	water molecules diffuse from an area of higher concentration to an area of lower concentration
isotonic	when the concentrations of solutes outside and inside the cells are equal, the outside solution is said to be this
contractile vacuoles	organelles that remove water
plasmolysis	the reason that plants wilt if they don't receive water is because the cell shrinks away from the cell walls and turgor pressure is lost. this is called:
cytolysis	the bursting of cells
facilitated diffusion	a type of passive transport; this process is used for molecules that cannot readily diffuse through cell membranes, even when there is a concentration gradient across the membrane
carrier proteins	in facilitated diffusion, the movement of these kinds of molecules across the cell membrane is assisted by specific proteins in the membrane. the proteins are known as this
ion channels	a type of transport involves membrane proteins known as this
active transport	in many cases cells must move materials from an area of lower concentration to an area of high concentration or "up" their concentration gradient. this movement of materials is known as
endocytosis	the process by which cells ingest external fluid, macromolecules and large particles including other cells
vesicle	a pouch pinches off from the cell membrand and becomes a membrane bound organelle

Created by: carolccoper98

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