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Synap Trans of Excit
Chemical Synaptic Transmission of Excitation
Question | Answer |
---|---|
Nerve impulse depolarizes nerve terminal | Step 1 |
Opening of voltage-operated Ca++ channels | Step 2 |
Exocytosis of ACh into synaptic cleft | Step 3 |
ACh diffuses across synaptic cleft | Step 4 |
ACh binds to receptors on upper portion of junctional folds of end-plate | Step 5 |
Rapid increase in permeability of Na+ | Step 6 |
End-plate potential creates local circuit currents | Step 7 |
Action potential propagated throughout muscle fiber | Step 8 |