Plasma Membrane Transport

Front

The lipid bilayer describes ___

Back

the cell membrane

Front

Movement across the cell membrane that does not require energy is called ___ transport.

Back

passive

Front

Facilitated diffusion moves substances ___ using the cell's energy.

Back

without

Front

The cell membrane is composed of proteins embedded in a ___ bilayer.

Back

phospholipid

Front

In ___ diffusion, membrane proteins help molecules across the membrane.

Back

facilitated

Front

What is the primary function of the plasma membrane?

Back

To regulate the movement of substances in and out of the cell.

Front

What are the two main types of transport across the plasma membrane?

Back

Active transport and passive transport.

Front

What is active transport?

Back

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

Front

What is passive transport?

Back

The movement of substances along their concentration gradient, without the use of energy.

Front

What role do channel proteins play in facilitated diffusion?

Back

They provide a passageway for specific molecules to cross the membrane.