Movement Across Cell Membranes Vocabulary

Front 1

Concentration

Back 1

The the mass of the solute divided by the volume of the solvent (in a solution).

Front 2

Diffusion

Back 2

The movement of particles from an area of high concentration to an area of low concentration. Moves to reach equilibrium without the use of energy.

Front 3

Equilibrium

Back 3

When particles are perfectly balanced.

Front 4

Semipermeable

Back 4

When only certain molecules can move through a cell membrane.

Front 5

Osmosis

Back 5

The diffusion of water through a semipermeable membrane.

Front 6

Isotonic

Back 6

When the concentration of the solution outside the cell is equal to the concentration inside the cell.

Front 7

Hypertonic

Back 7

When the solution outside the cell has a higher concentration than inside the cell.

Front 8

Hypotonic

Back 8

When the solution outside the cell has a lower concentration than inside the cell.

Front 9

Facilitated Diffusion

Back 9

The movement of specific molecules across the cell membrane through protein channels. Does not require energy.

Front 10

Active Transport

Back 10

When molecules move against the concentration gradient. Requires energy.

Front 11

Endocytosis

Back 11

The process of taking material into the cell by folding or pockets of the cell membrane.

Front 12

Phagocytosis

Back 12

"Cell eating" The process in which extensions of the cytoplasm surround a particle and package it within a food vacuole.

Front 13

Pinocytosis

Back 13

"Cell drinking" The process in which tiny pockets form along the cell membrane, fills up with liquids, and pinch off to form vacuoles within the cells.

Front 14

Exocytosis

Back 14

Active transport that involves the process of releasing large amounts of material from the cell.