Chapter 7
glycolipid
A lipid covalently attached to a carbohydrate. Role is to maintain stability of the cell
sodium-potassium pump
a carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions into the cell
An animal cell lacking carbohydrates on the external surface of its plasma membrane would likely be impaired in which function?
cell-cell recognition
In what way do the membranes of a eukaryotic cell vary?
certain proteins are unique to each membrane
The sodium-potassium pump is called an electrogenic pump because it _______
generates voltage across the membrane
The membranes of winter wheat are able to remain fluid when it is extremely cold by ________.
increasing the proportion of unsaturated phospholipids in the membrane
Diffusion across a biological membrane is called
passive transport
structure of a biological membrane
two layers of phospholipids with proteins either crossing the layers or on the surface of the layers
The movement of glucose into a cell against a concentration gradient is most likely to be accomplished by
cotransport of the glucose with a proton or sodium ion that was pumped across the membrane using the energy of ATP hydrolysis
What kinds of molecules pass through a cell membrane most easily?
small and hydrophobic