IB Biology 1.3 and 1.4 Cell Membrane

Front

What does amphipathic mean?

Back

The molecule has polar areas and non-polar areas.

Front

What is the function of a vesicle in a cell membrane?

Back

To carry products for export to the cell membrane.

Front

What process occurs by osmosis?

Back

Uptake of water by cells in the intestine.

Front

What is required for active transport of sodium ions in cells?

Back

Transmembrane proteins.

Front

Which regions of the cell membrane must be hydrophilic?

Back

A, B, and E.

Front

Define the term 'cell membrane'.

Back

A biological membrane that separates and protects the interior of all cells from the outside environment.

Front

What is the role of phospholipids in the cell membrane?

Back

They form a bilayer that provides structural integrity and fluidity to the membrane.

Front

Explain the concept of selective permeability in cell membranes.

Back

The ability of the cell membrane to allow certain substances to pass while blocking others.

Front

What is the significance of membrane fluidity?

Back

It allows for the movement of proteins and lipids within the membrane, facilitating cell signaling and transport.

Front

What are transmembrane proteins?

Back

Proteins that span the entire membrane and are involved in transport and communication.