Cell membranes Flashcards
1
Q
What does a cell membrane do?
A
Controls the movement of substances into and out of the cell.
2
Q
Is the cell membrane permeable?
A
It is selectively permeable, it only allows some substances to enter the cell.
3
Q
What are the main features of a cell membrane?
A
- Helps actively transport materials across it
- Provides a degree of mechanical support to the cell
- Helps the cell maintain shape
4
Q
What is the cell membrane made of?
A
Phospholipid bilayers
5
Q
What is in the phospholipid bilayer?
A
Proteins are scattered through the bilipid layer
6
Q
Are the heads hydrophobic or hydrophillic?
A
Hydrophillic
