Cell Membrane Structure and Function

Front

What is the primary structure of the cell membrane?

Back

The primary structure of the cell membrane is the phospholipid bilayer.

Front

What are integral proteins?

Back

Integral proteins are proteins that are embedded within the phospholipid bilayer and can span across the membrane.

Front

What are peripheral proteins?

Back

Peripheral proteins are proteins that are attached to the exterior or interior surfaces of the membrane but do not penetrate the bilayer.

Front

What is the role of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the fluidity of the cell membrane, making it less permeable to very small water-soluble molecules that might otherwise pass freely through.

Front

What is a glycolipid?

Back

A glycolipid is a lipid with a carbohydrate attached, which is found on the extracellular surface of the cell membrane and plays a role in cell recognition.

Front

What is a glycoprotein?

Back

A glycoprotein is a protein that has carbohydrate chains attached to it, which are important for cell recognition and signaling.

Front

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

Back

The fluid mosaic model describes the cell membrane as a dynamic and flexible structure composed of various proteins and lipids that can move laterally within the layer.

Front

What is selective permeability?

Back

Selective permeability is the property of the cell membrane that allows certain substances to pass through while restricting others.

Front

What are the main functions of the cell membrane?

Back

The main functions of the cell membrane include protecting the cell, regulating the movement of substances in and out of the cell, and facilitating communication with other cells.

Front

What is the significance of the phospholipid bilayer?

Back

The phospholipid bilayer forms the fundamental structure of the cell membrane, providing a barrier that separates the interior of the cell from the external environment.