Cell transport

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via the aid of a transmembrane protein, moving from an area of high concentration to low concentration.

Front

What is osmosis?

Back

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

Front

What does 'bilayer' refer to in cell membranes?

Back

'Bilayer' refers to the structure of the cell membrane, consisting of two layers of phospholipids.

Front

What is the function of the plasma membrane?

Back

The plasma membrane protects the cell and regulates what enters and exits the cell.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from an area of lower concentration to an area of higher concentration, requiring energy.

Front

What is passive transport?

Back

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

Front

What are the components of the cell membrane?

Back

The cell membrane is primarily composed of a phospholipid bilayer, proteins, cholesterol, and carbohydrates.

Front

What role do proteins play in cell transport?

Back

Proteins in the cell membrane facilitate the transport of substances across the membrane, either passively or actively.

Front

What is the difference between simple diffusion and facilitated diffusion?

Back

Simple diffusion is the movement of small or nonpolar molecules directly through the membrane, while facilitated diffusion requires specific proteins to help transport larger or polar molecules.

Front

What is a selectively permeable membrane?

Back

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