So we also have the opening of Ltype calcium channels at about negative 40 millivolts. Now, what exactly do we mean by Ltype calcium channels? So that basically means long opening calcium channels. So they open up slowly and they remain open. And basically, this means we have a very slow and steady rate of calcium ions, and they slowly move from a higher concentration to a lower concentration from the outside to the inside. And this is shown by this diagram.