Cell Transport

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 is the phospholipid bilayer?

Back

The phospholipid bilayer is a double layer of phospholipids that makes up the cell membrane, providing a barrier that separates the inside of the cell from the outside environment.

Front

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

Osmosis is the movement 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 facilitated diffusion?

Back

Facilitated diffusion is the process by which large or polar molecules move across the cell membrane through protein channels, from an area of high concentration to an area of low concentration without the use of energy.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from an area of low concentration to an area of high concentration, requiring energy (usually in the form of ATP).

Front

What role do channel proteins play in cell transport?

Back

Channel proteins facilitate the movement of specific molecules across the cell membrane, allowing substances to pass through the membrane more easily.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules during diffusion.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain substances to pass through while blocking others, maintaining the internal environment of the cell.