Cell Membrane Structure

Front

What is the primary function of the plasma membrane?

Back

To regulate what enters and leaves the cell.

Front

How many layers make up the phospholipid bilayer?

Back

2

Front

Which of the following is NOT true about the cell membrane?

Back

Contains digestive enzymes.

Front

What do channel proteins do in the cell membrane?

Back

Facilitate the transport of substances across the membrane.

Front

What role does cholesterol play in the cell membrane?

Back

Allows the fatty acids not to stick together.

Front

What are phospholipids composed of?

Back

A hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What is the fluid mosaic model?

Back

A model that describes the structure of the plasma membrane as a mosaic of various components, including phospholipids, cholesterol, and proteins, that move freely.

Front

What is the significance of membrane proteins?

Back

They assist in transport, act as enzymes, and play a role in cell signaling.

Front

What is selective permeability?

Back

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

Front

What is the difference between integral and peripheral proteins?

Back

Integral proteins span the membrane, while peripheral proteins are attached to the exterior or interior surfaces.