Cell Membrane Structure and Function

Front

What is the primary function of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, providing protection and support.

Front

What are the main components of the cell membrane?

Back

The main components are phospholipids, proteins, carbohydrates, and cholesterol.

Front

What is a phospholipid?

Back

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

Front

What role do proteins play in the cell membrane?

Back

Proteins assist in transporting substances across the membrane, act as receptors for signaling, and provide structural support.

Front

What is the lipid bilayer?

Back

The lipid bilayer is a double layer of phospholipids that forms the basic structure of the cell membrane.

Front

How do carbohydrates function in the cell membrane?

Back

Carbohydrates on the cell membrane help in cell recognition and communication.

Front

What is the role of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the cell membrane's fluidity and structure.

Front

What does it mean for the cell membrane to be selectively permeable?

Back

It means that the cell membrane allows certain substances to pass while blocking others.

Front

How thick is the lipid bilayer?

Back

The lipid bilayer is typically 2 layers thick.

Front

What is the fluid mosaic model?

Back

The fluid mosaic model describes the cell membrane as a flexible structure with various proteins embedded in or attached to a fluid lipid bilayer.