Passive Transport

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the need for energy input, typically moving from areas of high concentration to areas of low concentration.

Front

What is the direction of movement in passive transport?

Back

Molecules move from high concentration to low concentration.

Front

What is the structure that forms the cell membrane?

Back

Phospholipid bilayer.

Front

What is osmosis?

Back

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

Front

What type of molecules can pass through a semi-permeable membrane?

Back

Small molecules like water can pass through, while larger molecules like sugar may not.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move molecules across the cell membrane.

Front

What is a semi-permeable membrane?

Back

A semi-permeable membrane is a barrier that allows certain substances to pass through while blocking others.

Front

Why can't sugar molecules enter through a semi-permeable membrane?

Back

Sugar molecules are often too large to pass through the small holes of the semi-permeable membrane.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion refers to the movement of particles from high to low concentration, while osmosis specifically refers to the movement of water.

Front

What is an example of passive transport?

Back

An example of passive transport is the movement of oxygen from the lungs into the bloodstream.