Passive Transport: Simple, Facilitated, and Osmosis

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, relying on concentration gradients.

Front

What are the three main types of passive transport?

Back

The three main types of passive transport are simple diffusion, facilitated diffusion, and osmosis.

Front

Define simple diffusion.

Back

Simple diffusion is the process where molecules move directly through the cell membrane from an area of high concentration to an area of low concentration without energy.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across the cell membrane with the help of membrane proteins, without using energy.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from a region of high water concentration to a region of low water concentration.

Front

How do membrane proteins assist in cell communication?

Back

Membrane proteins help the cell communicate with the outside environment by receiving signals and facilitating interactions with other cells.

Front

What role does the plasma membrane play in homeostasis?

Back

The plasma membrane maintains cellular homeostasis by controlling which molecules enter and exit the cell.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move molecules against their concentration gradient, while passive transport does not require energy and moves molecules along their gradient.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, crucial for maintaining homeostasis.

Front

Give an example of a molecule that uses facilitated diffusion.

Back

Glucose is an example of a molecule that uses facilitated diffusion to enter cells through specific transport proteins.