CHECKPOINT: Cell Membrane Structure and Function

Front

What are the main components of the cell membrane?

Back

The main components of the cell membrane are phospholipids, proteins, cholesterol, and carbohydrate chains.

Front

What is the structure of a phospholipid?

Back

A phospholipid consists of a hydrophilic (water-attracting) 'head' and two hydrophobic (water-repelling) 'tails'.

Front

What role do carbohydrate chains play in the cell membrane?

Back

Carbohydrate chains are embedded in the phospholipid bilayer and function in cell recognition and communication with the extracellular environment.

Front

How do proteins function in the cell membrane?

Back

Proteins form channels and pumps that facilitate the transport of substances across the cell membrane.

Front

What is the function of cholesterol in the cell membrane?

Back

Cholesterol adds strength and flexibility to the cell membrane, helping to maintain its structure.

Front

What is the fluid mosaic model?

Back

The fluid mosaic model describes the cell membrane as a flexible layer made of lipid molecules with proteins embedded, allowing for movement and interaction.

Front

What is the significance of the phospholipid bilayer?

Back

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

Front

What is selective permeability?

Back

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

Front

What are integral proteins?

Back

Integral proteins are proteins that are embedded within the phospholipid bilayer and can span the membrane, playing roles in transport and communication.

Front

What are peripheral proteins?

Back

Peripheral proteins are proteins that are attached to the exterior or interior surfaces of the membrane and are not embedded within the lipid bilayer.