Transport: Passive vs Active

Front

What is the process of movement of molecules from an area of higher concentration to an area of lower concentration called?

Back

Diffusion.

Front

What is the term for the diffusion of water across a selectively permeable membrane?

Back

Osmosis.

Front

What is the process by which a cell membrane surrounds a particle and encloses it to bring it into the cell?

Back

Endocytosis.

Front

What is the process called when large molecules are engulfed by the cell membrane?

Back

Endocytosis.

Front

What is the term for the movement of substances against their concentration gradient, requiring energy?

Back

Active transport.

Front

What type of transport does not require energy and occurs along the concentration gradient?

Back

Passive transport.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport requires energy to move substances against their concentration gradient.

Front

What is facilitated diffusion?

Back

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

Front

What role do carrier proteins play in active transport?

Back

Carrier proteins help transport substances across the cell membrane against their concentration gradient, using energy.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the plasma membrane.