How might researchers identify which ion enters the cell from outside, causing the rapid rise in membrane potential that initiates the action potential in additional experiments?.

your answers are a,b,,e and f

i hope this

the product of the pressure and volume is also constant

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

i think its 100

i hope this !