Question

Which ions are necessary for transmission of action potential through synapse?

• A. Potassium and Calcium
• B. Sodium and Calcium
• C. Chloride and Sodium
• D. Potassium and Sodium

Answer 1

The correct option is B Sodium and Calcium

When the impulse reaches terminal button of the axon the $C{a}^{++}$ gates open and calcium influx occurs through presynaptic membrane.

The synaptic vesicles become active and rupture after coming in contact with presynaptic membrane. The neurotransmitter is released by into the synaptic cleft.

The neurotransmitter binds with the receptors of post synaptic membrane and Na+ gates open. $N{a}^{+}$ influx occurs and impulse (depolarization wave) is generated.