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selectively permeable

a property of cell membranes that allows some substances to pass through, while others cannot

diffusion, osmosis, active transport

Name three ways that substances can move into and out of a cell


What is the main method by which small molecules move into and out of cells?

higher to lower

What direction do molecules move in diffusion?


in this method, water molecules diffuse through a selectively permeable membrane


concentration of water molecules is the same inside and outside of the cell


most of the water is outside the cell


most of the water is inside the cell

diffusion, osmosis

two ways of moving things into and out of cells that do not need energy

passive transport

moving materials through a cell membrane without using energy


way cell membrane surrounds a particle, form a vacuole on the cell

transport protein

a protein located in the cell membrane that helps move specific substances in and out of the cell

engulfing, transport proteins

LIst 2 ways that the cell moves things by active transport

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