IB Biology B2.1 Membranes and Transport

Front

What does it mean that the cell membrane is a fluid mosaic?

Back

It is made of many different molecules, allowing for flexibility and movement within the membrane.

Front

What is facilitated diffusion?

Back

A type of passive transport that allows substances to cross membranes with the assistance of special proteins.

Front

What is active transport?

Back

The movement of molecules across a membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What role do carbohydrates play in the cell membrane?

Back

They are involved in cell recognition and signaling.

Front

What is a ligand gated channel?

Back

A type of membrane protein that opens in response to the binding of a neurotransmitter.

Front

What is the sodium-potassium pump?

Back

A type of active transport that moves sodium ions out of the cell and potassium ions into the cell.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is the difference between simple diffusion and facilitated diffusion?

Back

Simple diffusion does not require assistance from proteins, while facilitated diffusion does.

Front

What are glycolipids?

Back

Lipids with carbohydrate groups attached, important for cell recognition.

Front

What are glycoproteins?

Back

Proteins with carbohydrate groups attached, playing a key role in cell signaling.