Exercise 3: Neurophysiology of Nerve Impulses: Activity 8: Chemical Synaptic Transmission and Neurotransmitter Release
Lab Report
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. The end of the axon where it contacts a target is called the
You correctly answered: c. axon terminal.
2. Neurotransmitter is released into the synaptic gap by
You correctly answered: a. exocytosis.
3. Exocytosis of neurotransmitter from the axon terminal is triggered by an increase in the intracellular concentration of
You correctly answered: c. Ca2+ .
4. Neurotransmitter released into the synaptic gap reaches the target cell by
You correctly answered: b. diffusion.
5. At the target, neurotransmitter
You correctly answered: d. does all of the above.
Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. How is the neurotransmitter stored in the axon terminal before it is released?
You correctly answered: c. contained in synaptic vessicles
2. Are neurotransmitter molecules released one at a time or in packets?
You correctly answered: b. in packets
3. With the normal extracellular calcium concentration, [Ca2+ ], when the action potential reaches the axon terminal it
triggers
You correctly answered: b. release of neurotransmitter by exocytosis.
4. Comparing the low intensity stimulus to the high intensity stimulus, the high intensity stimulus causes
You correctly answered: b. more synaptic vesicles to undergo exocytosis
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