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 osmosis?

Back

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

Front

What does selectively permeable mean?

Back

Selectively permeable means that a cell membrane allows certain substances to pass through while blocking others.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport where molecules diffuse across the membrane with the help of transport proteins.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water enters the cell, causing it to swell and potentially burst.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water leaves the cell, causing it to shrink.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space.

Front

What is the role of protein channels in passive transport?

Back

Protein channels facilitate the movement of specific molecules across the cell membrane during passive transport.

Front

What is the difference between simple diffusion and facilitated diffusion?

Back

Simple diffusion occurs directly through the membrane, while facilitated diffusion requires protein channels to help move molecules.

Front

What is an example of a substance that moves via osmosis?

Back

Water is the primary substance that moves via osmosis.