Cell Membrane

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Active Transport

Back 1

The movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.

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Diffusion

Back 2

The spreading of something more widely.

Front 3

Endocytosis

Back 3

The taking in of matter by a living cell by invagination of its membrane to form a vacuole.

Front 4

Exocytosis

Back 4

A process by which the contents of a cell vacuole are released to the exterior through fusion of the vacuole membrane with the cell membrane.

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Facilitated diffusion

Back 5

The process of spontaneous passive transport

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Osmosis

Back 6

A process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one

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Passive transport

Back 7

A movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input.

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Sodium-potassium pump

Back 8

Active transport is responsible for the fact that cells contain a relatively high concentrations ofpotassium ions but low concentrations ofsodium ions

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Transport protein

Back 9

Is a protein that serves the function of moving other materials within an organism

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Vesicle transport

Back 10

A cellular transport process in which transported substances are moved in membrane-boundedvesicles

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Hypertonic Solution

Back 11

A particular type of solution that has a greater concentration of solutes on the outside of a cell when compared with the inside of a cell

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Hypotonic Solution

Back 12

Any solution that has a lower osmotic pressure than another solution

Front 13

Isotonic Solution

Back 13

Refers to two solutions having the same osmotic pressure across a semipermeable membrane

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Concentration Gradient

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The process of particles, which are sometimes called solutes, moving through a solution or gas from an area of higher number of particles to an area of lower number of particles

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Equilibrium

Back 15

The condition in which all acting influences are balanced or canceled by equal opposing forces, resulting in a stable system