Question

Which of the following ions transports across the plasma membrane during neurotransmission?

• A. $N{a}^{+},K^{+}$
• B. $N{a}^{+},C{l}^{-}$
• C. $M{g}^{2+},K^{+}$
• D. $C{a}^{2+},C{l}^{-}$
• E. $H^{+},K^{+}$

Answer 1

The correct option is A $N{a}^{+},K^{+}$

• In depolarization, the voltage-gated sodium ion channels that had been open while the cell was undergoing depolarization close again.
• The increased positive charge within the cell now causes the potassium channels to open.
• The sodium-potassium pump works continuously throughout this process. Hence, Na+, K+ ions transport across the plasma membrane during neurotransmission.

So, the correct answer is 'Na+,K+'.