Cell Transport Amoeba sisters

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as diffusion, osmosis, and active transport.

Front

What are the two main types of transport across cell membranes?

Back

Passive transport and active transport.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across the cell membrane without the use of energy, typically moving from an area of high concentration to an area of low concentration.

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient, from an area of low concentration to an area of high concentration, requiring energy.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel substances by vesicles fusing with the cell membrane.

Front

What is simple diffusion?

Back

Simple diffusion is the movement of molecules from an area of high concentration to an area of low concentration without the need for energy.

Front

What is facilitated diffusion?

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Facilitated diffusion is the process of passive transport of molecules across the cell membrane via a protein channel.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas.