Cell Transport - Part 2

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.

Front

What is Passive Transport?

Back

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

Front

What is Facilitated Diffusion?

Back

Facilitated Diffusion is a type of passive transport where molecules move across the cell membrane through a transport protein from high to low concentration.

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 the concentration gradient?

Back

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

Front

What does it mean to move against the concentration gradient?

Back

To move against the concentration gradient means to move from an area of low concentration to an area of high concentration, which requires energy.

Front

What is a transport protein?

Back

A transport protein is a protein that helps move substances across a cell membrane.

Front

What is the role of energy in Active Transport?

Back

Energy is required in Active Transport to move molecules against their concentration gradient.

Front

What is an example of Passive Transport?

Back

An example of Passive Transport is the diffusion of oxygen and carbon dioxide gases across the cell membrane.

Front

What is an example of Active Transport?

Back

An example of Active Transport is the sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell.