The concentration differences of these charged particles causes a difference in electric potential between the inside and outside of cells, known as the membrane potential.
ðə kˌɑːnsəntɹˈeɪʃən dˈɪfɹənsᵻz ʌv ðiːz tʃˈɑːɹdʒd pˈɑːɹɾɪkəlz kˈɔːzᵻz ɐ dˈɪfɹəns ɪn ᵻlˈɛktɹɪk pətˈɛnʃəl bᵻtwˌiːn ðɪ ɪnsˈaɪd ænd aʊtsˈaɪd ʌv sˈɛlz, nˈoʊn æz ðə mˈɛmbɹeɪn pətˈɛnʃəl.