Membrane and its Proteins
what is the most abundant type of molecule in the membrane?
phospholipids
a pathway for molecules to move across the membrane. this protein is open to both sides at the same time
channel
doesn't use energy
diffusion/passive transport
in osmosis, ____ moves ____ its concentration gradient
water, down/with
moves ____ Na+ to _______ of cell
3, outside
draw a phospholipid
glycerol, 2 fatty acids, phosphate group, head group
protein that is open to one side at a time
carrier
uses energy (ATP)
active transport
cell A has an equal concentration of solutes to cell B. Cell A is _____ to cell B
isotonic
moves ___ K+ to _____ of cell
2, inside
what are the two ways that phospholipids move around in the membrane?
laterally (side to side) and spinny in circles
moves two types of things in one direction
symporter
active transport moves things from ___ to ___ concentration
low to high
cell A has a higher concentration of solutes than cell B. Cell A is _____ to cell B
hypertonic
energy source
ATP
what are the 3 classifications of membrane proteins we talked about? (not uniporter, symporter, antiporter)
integral membrane proteins
peripheral membrane proteins
lipid-anchored proteins
moves one type of thing in one direction
uniporter
where does the energy for secondary active transport come from?
the concentration gradient that was set up by primary active transport
cell A has a lower concentration of solutes than cell B. Cell A is _____ to cell B
hypotonic
3 terms to describe the Na/K pump
Integral Membrane Protein
Transmembrane protein
carrier
antiporter
primary active transporter
electrogenic pump
what is the term for adding a carbohydrate to another molecule?
glycosylation
moves two types of things in opposite directions
antiporter
requires a protein (be broad with your answer)
facilitated transport
what are the transport proteins that allow water to pass through?
aquaporins
inside the cell, because of the Na/K pump, there is a ____ sodium concentration and a _____ potassium concentration
low, high