<prompt> Which of the following is not a channelopathy?Cystic fibrosisLiddles syndromeTay-sachs diseaseHypokalemic periodic paralysis  <response>: ChannelopathyA channelopathy refers to a disease involving dysfunction of an ion channel.Channelopathies are known that involve the ion channels for potassium, chloride, sodium and calciumIon channels serve many functions apart from electrical signal transduction: chemical signalling Ca 2 as a second messenger, transepithelial transport, regulation of cytoplasmic or vesicular ion concentration and pH, and regulation of cell volume. Therefore, ion channel dysfunction can cause diseases in many tissues. 