Need help!!

12-27   Indicate whether the statements below are true or false. If a statement is false, explain why it is false.
B.   Aquaporin channels are found in the plasma membrane, allowing the rapid passage of water molecules and small ions in and out of cells.
C.   The ion selectivity of a channel completely depends solely on the charge of the amino acids liningthe pore inside the channel.
D.   Most ion channels are gated, which allow them to open and close in response to a specific stimulus rather than allowing the constant, unregulated flow of ions.