Question 1
When more action potentials arrive at the axon terminal, how are neurotransmitters affected?
◦ Different molecules are released into the synapse.
◦ More molecules are released into the synapse.
◦ Fewer molecules are released into the synapse.
◦ There is no effect–all signals are identical.
Question 2
When more action potentials arrive at the axon terminal, how is a postsynaptic neuron affected?
◦ Neurotransmitter release increases, but does not change the graded potentials in postsynaptic neurons.
◦ Neurotransmitter release increases, increasing the frequency or magnitude of graded potentials in the postsynaptic neuron.
◦ Neurotransmitter release does not change, but voltages in the postsynaptic neuron increase.
◦ Neurotransmitter release does not change, and the postsynaptic neuron behaves the same way it always behaves.
Mechanisms of action of antimicrobial drugs
Neuronal action potential.
Mechanisms of action of antifungal drugs.
Schematic depiction of the action of tryptophan synthase in one functional unit
A model for helicase action
Neuron illustration