Cell Membrane Flashcard

Front

What is the function of the cell membrane?

Back

The cell membrane controls 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, cholesterol, and carbohydrates.

Front

What is a phospholipid?

Back

A phospholipid is a molecule that has a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What does the term 'selectively permeable' mean in relation to the cell membrane?

Back

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

Front

What role do proteins play in the cell membrane?

Back

Proteins form channels and pumps that help substances move in and out of the cell.

Front

What is the significance of cholesterol in the cell membrane?

Back

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

Front

What are carbohydrates used for in the cell membrane?

Back

Carbohydrates are involved in cell recognition and communication.

Front

How do carrier proteins function in the cell membrane?

Back

Carrier proteins bind to specific substances and change shape to transport them across the membrane.

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 phospholipid bilayer.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their gradient.