<prompt> Which of the following is a L-type calcium channel blocker:NifedipinesAmlodipinesDiltiazemAll of the above  <response>: Ans. d All of the aboveRef. KDT 6th ed. 528Types of Calcium Channel Blocker L-Type long lasting currentT-type transient currentN-Type neuronalLocations and function Excitation -contraction coupling in cardiac and smooth muscle SA, A-V node: conductivity Endocrine cell: Hormone release Neurons: transmitter release Sa node- pacemaker activity T current and repetitive spikes in thalamic and other neurons Endocrine cells hormone release Certain arteries constriction Only on Neurons in CNS, sympathetic and myenteric plexuses transmitter releaseBlocker drugsAmlodipines, Nifedipine, diltiazem, verapamilMibefradil, flunarizine, ethosuximideo- conotoxin 