3.(2pt) Define pre-synaptic cell and post-synaptic cell?
4.(2.5pts) Indicate the order of events by writing numbers in the blanks preceding each event.
__2_ inward diffusion of Ca
2+
__3_ synaptic vesicles fuse the plasma membrane of presynaptic neuron
__1_ action potential reaches the end of the axon
__5_ neurotransmitters bind to ligand-gated receptors in the postsynaptic membrane
__4_ neurotransmitters are released from the pre-synaptic neuron and diffuse across the
synaptic gap
5.(1pt) Why do vesicles need to fuse to the plasma membrane of the pre-synaptic cell?
6.(2pts) How will the frequency of action potentials coming from the pre-synaptic neuron affect the intensity of the graded potentials in the post-synaptic neuron? Using complete sentences, list the steps involved using the following words at least once: pre-synaptic neuron, post-synaptic neuron, vesicles, neurotransmitters, ion channels, synapse, intensity, frequency. (Hint: You can use the steps in question 4 to help you get started.)
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- Summer '19
