nureotransitters

Question 1

After receiving a signal (via neurotranmitters from another nerve cell), a sequence of Voltage-gated Na+ channels open down the length of the axion. This propagates a change in the voltage (measure of the charges across the membrane) down the axion.
What sequence of events follows when that de-polarization reaches the end of the axion?

Answer 1

Voltage gated ion channels. When action potential reaches the axon termical, vltage gates open allowing calium calcium channels. When opened, calcium ions enter down their gradient and increase calium inside axon. Increased concentration, will cause chanes in proteins located along axon to fuse with membrane