Cell Membrane and Types of Transport

Front

What is the primary structure of the cell membrane?

Back

Phospholipid bilayer.

Front

What does it mean for a membrane to be selectively permeable?

Back

It allows some molecules to cross while blocking others.

Front

Which organelle controls the entry and exit of substances in a cell?

Back

Cell membrane.

Front

What are the three types of transport that occur from high to low concentration?

Back

Diffusion, osmosis, facilitated diffusion.

Front

What is facilitated diffusion?

Back

A process that uses protein channels to help large molecules move through the cell membrane.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is active transport?

Back

The movement of molecules against their concentration gradient, requiring energy.

Front

What role do cholesterol molecules play in the cell membrane?

Back

They help to stabilize the membrane's fluidity.

Front

What is the function of carbohydrates in the cell membrane?

Back

They serve as recognition sites for cell signaling.

Front

What is the difference between diffusion and facilitated diffusion?

Back

Diffusion occurs directly through the membrane, while facilitated diffusion requires protein channels.