active and passive transport

Front

What is diffusion?

Back

A net process of a molecule moving from a high concentration to low concentration.

Front

What is required for active transport to occur?

Back

Energy.

Front

True or false: Passive transport requires energy to occur.

Back

True.

Front

What type of transport involves the cell membrane engulfing particles?

Back

Endocytosis.

Front

What are the three types of passive transport?

Back

Diffusion, osmosis, facilitated diffusion.

Front

Define osmosis.

Back

The movement of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is facilitated diffusion?

Back

The process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What is the main 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.

Front

What is exocytosis?

Back

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

Front

What role do transport proteins play in cellular transport?

Back

Transport proteins assist in the movement of substances across the cell membrane, either passively or actively.