How do you do this question
for brainliest

Ibelieve it is b. proton.hope my answer has you : )

Ithink b not to sure hope that : )

Each calcium ion has a charge of +2, which can also be written as ca2+. if those ions move out of the neuron and no other ions are moving, the neuron would lose the positive charge associated with those ions and become more negatively charged.