The postsynaptic neuron becomes fatigued after repeatative stimulation of an excitatory synapse at a rapid rate. This is due to
A
Exhaustion of neurotransmitter store in presynaptic terminal
B
Progressive inactivation of many postsynaptic receptors
C
Slow development of abnormal concentration of ions in postsynaptic neurons
D
Decrement of number of calcium channels of presynaptic terminal
E
Increment of cholinesterase in synaptic cleft
Correct Answer: Exhaustion of neurotransmitter store in presynaptic terminal, Progressive inactivation of many postsynaptic receptors, Slow development of abnormal concentration of ions in postsynaptic neurons
