Transport of Molecules: Active and Passive

Front

What is osmosis?

Back

Osmosis is the passive transport of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration.

Front

What is diffusion?

Back

Diffusion is the passive transport process that allows small molecules like oxygen and carbon dioxide to move from an area of high concentration to an area of low concentration.

Front

What is active transport?

Back

Active transport is the type of cellular transport that requires energy to move molecules from an area of low concentration to an area of high concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a form of passive transport that uses channel proteins or carrier proteins to move molecules from high concentration to low concentration, such as glucose entering a cell.

Front

What is a semi-permeable membrane?

Back

A semi-permeable membrane is a barrier that allows certain molecules to pass through while blocking others, facilitating selective transport.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves molecules from high to low concentration, while active transport requires energy to move molecules from low to high concentration.

Front

What are channel proteins?

Back

Channel proteins are integral membrane proteins that facilitate the transport of ions and small molecules across the cell membrane.

Front

What are carrier proteins?

Back

Carrier proteins are proteins that bind to specific molecules and change shape to shuttle them across the cell membrane.

Front

What is endocytosis?

Back

Endocytosis is an active transport process where cells engulf substances from the outside environment, bringing them into the cell.

Front

What is exocytosis?

Back

Exocytosis is an active transport process where cells expel materials by vesicles fusing with the cell membrane.