Copy of 2.) Plasma (Cell) Membrane Questions (5/28/2026)

The plasma membrane is composed mostly of and protein.

Each phospholipid has two parts:

a. A polar head that is hydrophilic, which means that it with water.

b. Nonpolar tails are which means that they are repelled by water.

In plasma membranes, phospholipids arrange themselves into two layers (lipid bilayer).

a. The polar heads will face toward the fluid in and around the cell.

b. The nonpolar tails will face away from the fluid in and around the cell.

When temperatures are low, cholesterol prevents the cell membrane from becoming too and when temperatures are high, it prevents the cell membrane from becoming too .

There are two different types of protein. The first type , are used as channels and pumps in the cell membrane. The second type, are used for cell recognition.

The cell membrane also contains carbohydrates, which also aid peripheral proteins in performing .

There are two different types of carbohydrates in the cell membrane.

are attached to proteins in and on the plasma membrane.

Glycolipids are attached to (be specific).

Identify each labeled part of the cell membrane model by name (use the diagram on your notes - it's not identical, but it's close enough).

Don't use, "Channel Protein," or "Carrier Protein."

a.) b.) c.) d.)

e.) f.) g.)

Don't use, "Channel Protein," or "Carrier Protein."