active and passive transport

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region 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, typically from a region of higher concentration to a region of lower concentration.

Front

What is diffusion?

Back

Diffusion is the net movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a semipermeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What are the three types of passive transport?

Back

The three types of passive transport are diffusion, osmosis, and facilitated diffusion.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf external substances, bringing them into the cell in a vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles, releasing them outside the cell.

Front

What role do vesicles play in transport?

Back

Vesicles are small membrane-bound sacs that transport materials within the cell and facilitate endocytosis and exocytosis.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.