Cell Transport

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

Front

What are the main types of passive transport?

Back

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

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a membrane.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel substances by vesicles fusing with the plasma membrane.

Front

How does facilitated diffusion differ from simple diffusion?

Back

Facilitated diffusion requires specific transport proteins to help move substances across the membrane, while simple diffusion does not.

Front

What role do transport proteins play in cell transport?

Back

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

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What is the significance of concentration gradients in transport processes?

Back

Concentration gradients drive passive transport, as substances move from areas of higher concentration to areas of lower concentration.

Front

What is the difference between primary and secondary active transport?

Back

Primary active transport directly uses ATP to transport molecules, while secondary active transport uses the energy from the movement of other molecules.