Active and passive transport

Front

What is a semi-permeable membrane?

Back

A membrane that allows certain molecules to pass through while blocking others.

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

Give an example of diffusion.

Back

Food coloring spreading in water.

Front

What is active transport?

Back

The movement of molecules against their concentration gradient, requiring energy.

Front

What is passive transport?

Back

The movement of molecules across a membrane without the use of energy.

Front

What is osmosis?

Back

The diffusion of water across a semi-permeable membrane.

Front

What is endocytosis?

Back

The process by which cells take in substances by engulfing them.

Front

What is exocytosis?

Back

The process by which cells expel materials in vesicles.

Front

What role do proteins play in active transport?

Back

Proteins act as pumps to move substances across the membrane using energy.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy; passive transport does not.