Cell Membrane & Transport

Front

What is diffusion?

Back

Diffusion is the process by which particles move from an area of high concentration to an area of low concentration.

Front

How does diffusion differ from osmosis?

Back

Osmosis is a specific type of diffusion that involves the movement of water across a selectively permeable membrane.

Front

What does hydrophobic mean?

Back

Hydrophobic refers to substances that repel water or do not mix with water.

Front

What is the role of the cell membrane?

Back

The cell membrane controls what substances can enter or leave the cell, maintaining homeostasis.

Front

What are the main components of the cell membrane?

Back

The main components of the cell membrane include phospholipids, proteins, cholesterol, and carbohydrates.

Front

Why is cholesterol important in the cell membrane?

Back

Cholesterol helps to maintain membrane fluidity and flexibility.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain substances to pass through while blocking others.

Front

What is the function of membrane proteins?

Back

Membrane proteins assist in transport, act as receptors, and provide structural support.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a membrane via specific transmembrane integral proteins.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (ATP).