sodium-potassium pump
Membrane potential - a nerve cell set and ready to fire;"The wave of reverse polarity" i.e. sodium versus potassium trans-cell-membrane ion passaging - a nerve cell firing; andRecharge period - the regeneration time.
The chief positive intracellular ion in a resting neuron is a potassium ion. Just inside the cell of a resting neuron, the membrane is negative.
I think you're looking for three ... over the long run. But the trick is that K+ doesn't need to be pumped in. Membrane proteins act as variable sized pore in the membrane (channels) and the potassium flows in under electrostatic forces ... all the work is done pumping the Na+ out.
One way to overcome a neuron's refractory period is by using drugs that block potassium channels, such as tetraethylammonium. Another approach is to use drugs that inhibit sodium-potassium pumps, like ouabain, to prevent the restoration of resting membrane potential. Alternatively, drugs that enhance neurotransmitter release, such as calcium channel blockers, can lead to an increased action potential frequency.
The first element in the fourth period of the periodic table is potassium with the atomic number 19.
Potassium (K) is a metal in Group I of the Periodic Table of the Elements. K has an atomic number of 19 and a molecular weight of 39.10 grams per mole.
The first element in the fourth period of the periodic table is potassium (K).
Potassium
Potassium belongs to group-1. It has one valence electron.
Potassium and magnesium are not in the same period on the periodic table. Potassium is in the fourth period (row) while magnesium is in the third period. They are both in the same group (column), Group 2, which are known as the alkaline earth metals.
Chlorine is the halogen that is in the same period as potassium. They are both in period 3 of the periodic table.
Potassium (K) has one valence electron and is located in period 4 of the periodic table.