324 Cell Membrane and Transport Kanya Flashcard

Front

What happens to an egg placed in pure water for 48 hours?

Back

The egg will gain water and swell.

Front

What is the function of the plasma membrane?

Back

To regulate what enters and leaves the cell.

Front

What is a carrier or transport protein?

Back

A protein that allows large molecules to pass through the cell membrane.

Front

What do transport and channel proteins do in the cell membrane?

Back

They allow large molecules to pass through the cell membrane.

Front

What is a selectively permeable membrane?

Back

A membrane that allows some molecules to cross while others cannot.

Front

What is the structure of the plasma membrane?

Back

It is composed of a phospholipid bilayer with embedded proteins.

Front

What role do cholesterol molecules play in the cell membrane?

Back

They help stabilize the fluidity of the cell membrane.

Front

What is osmosis?

Back

The movement of water across a selectively permeable membrane.

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport does.