Cell membrane structure

Front

What is the structure of the cell membrane?

Back

The cell membrane is primarily composed of a phospholipid bilayer, proteins, cholesterol, and carbohydrates.

Front

What are phospholipids?

Back

Phospholipids are molecules that form the basic structure of the cell membrane, consisting of hydrophilic (water-attracting) heads and hydrophobic (water-repelling) tails.

Front

What role do channel proteins play in the cell membrane?

Back

Channel proteins facilitate the transport of specific substances across the cell membrane by forming channels.

Front

What is the function of cholesterol in the cell membrane?

Back

Cholesterol helps to maintain the fluidity and stability of the cell membrane.

Front

What are glycoproteins?

Back

Glycoproteins are proteins that have carbohydrate groups attached to them, playing key roles in cell recognition and signaling.

Front

What is the significance of the fluid mosaic model?

Back

The fluid mosaic model describes the cell membrane as a dynamic structure with various proteins floating in or on the fluid lipid bilayer.

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 of the membrane.

Front

How do hydrophilic and hydrophobic regions affect membrane structure?

Back

Hydrophilic regions face the aqueous environment, while hydrophobic regions face inward, creating a bilayer that is selectively permeable.

Front

What is selective permeability?

Back

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

Front

What are the functions of membrane proteins?

Back

Membrane proteins are involved in transport, acting as channels or carriers, as well as in signaling and cell recognition.