Terms in this set (15)
phospholipids & proteins
the two main components of a membrane
feature of the cell membrane, allowing only some molecules to cross it.
movement across a cell membrane that requires no energy from the cell.
osmosis & diffusion
examples of passive transport
the movement of molecules down a concentration gradient from area of higher to area of lower concentration.
Examples of diffusion
glucose moving from the blood to the cells for respiration, oxygen moving from the lungs to the blood
the movement of water molecules from an area of higher water concentration to an area of lower water concentration, across a selectively permeable membrane.
effect of being placed in a solution of higher water concentration on animal cells
effect of being placed in a solution of lower water concentration on animal cells
effect of being placed in a solution of higher water concentration on plant cells
effect of being placed in a solution of lower water concentration on plant cells
the movement of molecules and ions from an area of low concentration to an area of high concentration, against a concentration gradient.
required by membrane proteins for active transport
Bilayer of phospholipids
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