transport across cell membranes - 2 Flashcards
topic 2
1
Q
what does it mean when membranes let some molecules through but not others
A
partially permeable
2
Q
what does the fluid mosaic model describe
A
phospholipid molecules form a continuous double layer called a bilayer.
it’s fluid because phospholipids are constantly moving
3
Q
2 types of proteins in membrane and what they do
A
channel proteins and carrier proteins
which allow large molecules/ions to pass through the membrane
4
Q
what do receptor proteins on the surface do
A
to detect chemicals released by other cells
5
Q
what protein has a carbohydrate attached to it
A
glycoproteins
