🟢2.61: EXAM REVIEW: MEMBRANE AND TRANSPORT: 4D 15W S1 24

Front

What is the structure labeled K in a cell membrane?

Back

Phospholipid bilayer.

Front

What is the structure labeled H in a cell membrane?

Back

Cholesterol.

Front

What are proteins that extend all the way across the lipid bilayer called?

Back

Transmembrane proteins.

Front

What are proteins built into the cell membrane that assist with the movement of materials called?

Back

Transport proteins.

Front

What type of transport involves movement against the concentration gradient?

Back

Active transport.

Front

What is the primary function of the phospholipid bilayer?

Back

To provide a barrier that separates the interior of the cell from the external environment.

Front

What role do cholesterol molecules play in the cell membrane?

Back

They help to stabilize the membrane's fluidity.

Front

What are glycoproteins and what is their function?

Back

Glycoproteins are proteins with carbohydrate chains attached; they play a role in cell recognition and signaling.

Front

What are integral proteins?

Back

Proteins that are permanently attached to the membrane and can span across the bilayer.

Front

What is passive transport?

Back

The movement of substances across a cell membrane without the use of energy, typically down their concentration gradient.