Cell Membranes And Transport Chapter 4

Front 1

Surface Area

Back 1

Volume ration decreases as the size of any three-dimensional object increases.

Front 2

Diffusion

Back 2

The net movement of molecules or ions from a region of higher concentration to a region of lower concentration down a gradient, as a result of the random movements of particles.

Front 3

Facilitated Diffusion

Back 3

The diffusion of a substance through transport proteins in a cell membrane.

The proteins provide hyprophilic areas that allow the molecules or ions to pass through the membrane which would otherwise be less permeable to them.

Front 4

Osmosis

Back 4

The net movement of water molecules from a region of higher water potential to a region of lower water potential, through a partially permeable membrane, as a result of their random motion.

Front 5

Active Transport

Back 5

The movement of molecules or ions through transport proteins across a cell membrane, against their concentration gradient, using energy from ATP.

Front 6

Endocytosis

Back 6

The bulk movement of liquids (pinocytosis) or solids (phagocytosis) into a cell, by the infolding of the cell surface membrane to form vesicles containing the substance.

Hint 6

Endocytosis

Front 7

Exocytosis

Back 7

The bulk movement of liquids or solids out of a cell, by the fusion of vesicles containing the substance with the cell surface membrane.