Passive Transport

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, moving from an area of high concentration to an area of low concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses carrier proteins to help move molecules across the cell membrane from high concentration to low concentration.

Front

What is osmosis?

Back

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

Front

What happens to cells in a hypotonic solution?

Back

In a hypotonic solution, cells will swell and may burst due to the influx of water.

Front

What happens to cells in a hypertonic solution?

Back

In a hypertonic solution, cells will shrink as water moves out of the cell.

Front

What is the difference between diffusion and facilitated diffusion?

Back

Diffusion is the movement of molecules from high to low concentration without assistance, while facilitated diffusion requires specific carrier proteins to help transport molecules.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, maintaining the internal environment of the cell.

Front

What role do carrier proteins play in facilitated diffusion?

Back

Carrier proteins bind to specific molecules and change shape to transport them across the cell membrane during facilitated diffusion.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in concentration of a substance across a space, driving the movement of molecules from high to low concentration.

Front

Why is energy not required for passive transport?

Back

Energy is not required for passive transport because molecules move along the concentration gradient, which is a natural process.