N-type inactivation of the slo1 (“slow-one”) type of these proteins can be described by the ball-and-chain model. One of these proteins uses the conserved TVGYG sequence as a “selectivity filter.” The “long-lasting” type of another class of these proteins is resistant to omega-conotoxins but not to dihydropyridines (“di-hydro-pyridines”). Metabotropic glutamate receptors are contrasted with these proteins that are alternatively activated by NMDA. (-5[1])Two-pore-domains are found in the “leak” type of these proteins, other types of which include inward and outward rectifying classes. Inhibitors of these proteins like tetrodotoxin are tested using patch clamps. Delayed voltage gating of two different types of these proteins generates action potentials. For 10 points, name these membrane proteins that allow charged species to pass through. ■END■ (10[1]0[3])