In a neuron, during the depolarization phase that may trigger an action potential . View Available Hint(s) In a neuron, during the depolarization phase that may trigger an action potential . most voltage-gated sodium channels are open most voltage-gated sodium channels become inactivated some voltage-gated sodium channels are open most voltage-gated sodium and potassium channels are open most voltage-gated potassium channels are open

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the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

it is called the mitotic spindle

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