<h3><em>aquaporins</em></h3><h3><em>(b) Carrier proteins are more selective, often only allowing one particular type of molecule to cross. A specialized example of facilitated transport is water moving across the cell membrane of all cells, through protein channels known as aquaporins.</em></h3>
(b) Carrier proteins are more selective, often only allowing one particular type of molecule to cross. A specialized example of facilitated transport is water moving across the cell membrane of all cells, through protein channels known as aquaporins.
