Passive & Active transport

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, moving from an area of higher concentration to an area of lower concentration.

Front

What is active transport?

Back

Active transport is the movement of substances against a concentration gradient, from an area of lower concentration to an area of higher concentration, requiring energy.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move molecules across the plasma membrane.

Front

What is osmosis?

Back

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

Front

What are examples of materials that can move across a membrane via passive transport?

Back

Water, oxygen, and carbon dioxide can move across a membrane through passive transport.

Front

What does it mean for molecules to move down a concentration gradient?

Back

Moving down a concentration gradient means that molecules are moving from an area of higher concentration to an area of lower concentration.

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 a concentration gradient?

Back

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

Front

What is the difference between simple diffusion and facilitated diffusion?

Back

Simple diffusion is the direct movement of molecules through the membrane, while facilitated diffusion requires specific transport proteins.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain substances to pass through while blocking others.