passive and active transport study guide

Front

What is passive transport?

Back

Passive transport is the movement of particles across a cell membrane without the use of energy. It occurs naturally and relies on the concentration gradient.

Front

True or False: The movement of particles across a cell is called passive transport?

Back

True

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport where molecules move through a cell membrane via specific transport proteins, from an area of high concentration to an area of low concentration.

Front

True or False: Exocytosis is the release of substances from a cell?

Back

True

Front

What is diffusion?

Back

Diffusion is the process where molecules move from an area of high concentration to an area of low concentration until they are evenly distributed.

Front

True or False: Passive transport requires energy?

Back

False

Front

What is active transport?

Back

Active transport is the movement of particles across a cell membrane against the concentration gradient, requiring energy (usually from ATP).

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell takes in substances by engulfing them in a membrane.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of particles.