Cell Membranes Flashcards
1
Q
what are the two main constituents of a cell membrane?
A
lipids
proteins
2
Q
which part of a phospholipid is hydrophillic?
A
the head (faces outwards)
3
Q
which part of a phospholipid is hydrophobic?
A
the tail (faces inwards)
4
Q
what are cell membranes impermeable to?
A
charged molecules
5
Q
what can move easily across the cell membrane?
A
small, uncharged, polar molecules
6
Q
what are the two broad classes of membrane proteins?
A
peripheral
integral
7
Q
what is a peripheral membrane protein?
A
one that is not embedded within the membrane
8
Q
what is an integral membrane protein?
A
ones that are intimately associated with the lipid bilayer
