Cell Membrane

Front

What is the function of the plasma membrane?

Back

To regulate what enters and leaves the cell.

Front

What is the smallest, most basic unit of life?

Back

Cell

Front

How many layers of phospholipids are in a cell membrane?

Back

Two

Front

What does 'bilayer' mean?

Back

Two layers.

Front

True or false: Some things are not allowed to enter the cell at all.

Back

True.

Front

What is a phospholipid?

Back

A molecule that makes up the cell membrane, consisting of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What is selective permeability?

Back

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

Front

What role do proteins play in the cell membrane?

Back

Proteins help transport substances across the membrane and can act as receptors for signaling.

Front

What is the fluid mosaic model?

Back

A model that describes the cell membrane as a flexible layer made of lipid molecules with embedded proteins.

Front

What is the role of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the membrane's fluidity.