Active Transport

proteins sandwiched between two layers of  phospholipids

proteins embedded in two layers of  phospholipids

phospholipids sandwiched between two layers of  proteins

a layer of protein coating two layers of  phospholipids

the fluidity of phospholipids and the pattern of  proteins in the membrane

the fluidity of proteins and the pattern of  phospholipids in the membrane

the ability of proteins to switch sides in the membranes

the fluidity of hydrophobic regions, proteins, and the  mosaic pattern of hydrophillic regions

against their concentration gradients using energy

against their concentration gradients without the use  of energy

with their concentration gradients using energy

with their concentration gradients without the use of  energy

carrier protein  

channel protein

any integral protein

any transmembrane protein