06 Cell Membrane Bio IA Honors

Front

What is the primary function of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

What are the main components of the cell membrane?

Back

Lipids, proteins, and carbohydrates.

Front

What is a phospholipid?

Back

A molecule that makes up the cell membrane, consisting of a hydrophilic head and two hydrophobic tails.

Front

What does 'selectively permeable' mean in relation to the cell membrane?

Back

It means that the membrane allows certain substances to pass while blocking others.

Front

What role do proteins play in the cell membrane?

Back

They function as channels, receptors, and markers.

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is active transport?

Back

The movement of molecules against their concentration gradient, requiring energy.

Front

What is an isotonic solution?

Back

A solution where the concentration of solutes is equal inside and outside the cell.

Front

What is the significance of the fluid mosaic model?

Back

It describes the cell membrane as a flexible structure with various proteins embedded in or attached to a bilayer of phospholipids.