Cell membrane and transport

Front

What is the primary function of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

Define active transport.

Back

The movement of particles against a concentration gradient, requiring energy.

Front

What is passive transport?

Back

The movement of substances across a cell membrane without the use of energy.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What are phospholipids?

Back

Molecules that make up the cell membrane, consisting of a hydrophilic head and hydrophobic tails.

Front

What role do channel proteins play in the cell membrane?

Back

They facilitate the transport of specific substances across the membrane.

Front

What is facilitated diffusion?

Back

The process of transporting substances across a membrane with the help of proteins, without energy.

Front

What is the significance of cholesterol in the cell membrane?

Back

Cholesterol helps to maintain membrane fluidity and stability.

Front

What type of molecules can easily pass through the cell membrane?

Back

Small, non-polar molecules like CO2 and O2.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of any substance, while osmosis specifically refers to the movement of water.