PART 1: Fill in the blanks to complete the statement.

The cell membrane is also called the 1. ___________ membrane and is made of a phospholipid 2.

__________ . The phospholipids have a 3. ______________ (water-attracting) 4. _____________ and

two 5. ______________ (water-repelling) 6. ______________. The head of a phospholipid is made of an

alcohol and 7._______________ group, while the tails are chains of 8.____________. Phospholipids

can move 9.______________ and allow water and other 10.____________ molecules to pass through

into or out of the cell.
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