Cell membrane and transport

Front

What is osmosis?

Back

Osmosis is the movement of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What type of transport allows small, non-polar molecules like CO2 and O2 to pass through the cell membrane?

Back

Diffusion.

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 (ATP).

Front

What are the two types of passive transport?

Back

Osmosis and diffusion.

Front

What is the primary substance that osmosis involves?

Back

Water.

Front

Define diffusion.

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.

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 role do proteins play in the cell membrane?

Back

Proteins in the cell membrane assist in transport, act as receptors, and provide structural support.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others.

Front

What is the difference between osmosis and diffusion?

Back

Osmosis specifically refers to the movement of water, while diffusion refers to the movement of any type of molecule.