What molecules can get through the cell membrane directly?
____________ allow small particles in and out of the cell
Diffusion is the movement of particles across a membrane from a ____ concentration to a ____ concentration
Which is not a form of passive transport
__________ is the movement of small particles across a membrane with the use of energy
If red blood cells are placed in a solution of salt water, the water concentration outside the cell will be___ and water will leave the cell
Large particles come into the cell through ___________
Large particles leave the cell through
Energy is needed to move particles from an area of _____ concentration to an area of ____ concentration
The cell membrane is made of
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