**The Cell Membrane and Transport**

Front

What is the process called when white blood cells engulf bacteria?

Back

Phagocytosis

Front

What functions as a recognition site for interactions between cells?

Back

Glycolipids

Front

What are the characteristics of the tails of a phospholipid?

Back

They are hydrophobic.

Front

What is the role of cholesterol molecules in the cell membrane?

Back

They alter the fluidity of the membrane.

Front

What is the hydrophobic region of the cell membrane?

Back

The tails of phospholipids.

Front

What is the primary function of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

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

Back

Passive transport and active transport.

Front

What is passive transport?

Back

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

Front

What is active transport?

Back

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

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.