Week 6 | Physio Ex Simulation - Activity 8:
Chemical Synaptic Transmission and
Neurotransmitter Release Question and
answers correctly solved 2025
The end of the axon where it contacts a target is called the - correct answer
axon terminal
Neurotransmitters is released into the synaptic gap by - correct answer
exocytosis
Exocytosis of neurotransmitter from the axon terminal is triggered by an
increase in the intracellular concentration of - correct answer Ca2+
Neurotransmitter released into the synaptic gap reaches the target cell by -
correct answer diffusion
At the target, neurotransmitter
a. binds to receptor proteins
b. causes membrane channels to open or close
c. causes a change in membrane potential
d. all of the above - correct answer d. all of the above
Why does the stimulus intensity affect the amount of neurotransmitter release
at the axon terminal? - correct answer the stimulus intensity directly affects
the amount of calcium entering the axon terminal and the stimulus intensity
, proportionally affects the number of synaptic vesicles that discharge their
contents into the synaptic cleft
Predict Question 1:
You have just observed that each action potential in a burst can trigger
additional neurotransmitter release. If calcium ions are removed from the
extracellular solution, what will happen to neurotransmitter release at the axon
terminal? - correct answer There will be more neurotransmitter release.
Why is there NO neurotransmitter release from the axon terminal when there
are no calcium ions in the extracellular solution? - correct answer Exocytosis
of the synaptic vesicles is calcium dependent
Predict Question 2:
What will happen to neurotransmitter release when low amounts of calcium
are added back to the extracellular solution? - correct answer
Neurotransmitter release will increase a small amount
What will happen to neurotransmitter release when Magnesium is added to
the extracellular solution? - correct answer There will be no neurotransmitter
release
Why did the high intensity stimulation fail to trigger the same amount of
neurotransmitter release in the presence of extracellular Mg2+ as in the
control extracellular solution? - correct answer Mg2+ blocks the calcium
channels in the axon terminal
How is the neurotransmitter stored in the axon terminal before it is released? -
correct answer contained in synaptic vesicles
Chemical Synaptic Transmission and
Neurotransmitter Release Question and
answers correctly solved 2025
The end of the axon where it contacts a target is called the - correct answer
axon terminal
Neurotransmitters is released into the synaptic gap by - correct answer
exocytosis
Exocytosis of neurotransmitter from the axon terminal is triggered by an
increase in the intracellular concentration of - correct answer Ca2+
Neurotransmitter released into the synaptic gap reaches the target cell by -
correct answer diffusion
At the target, neurotransmitter
a. binds to receptor proteins
b. causes membrane channels to open or close
c. causes a change in membrane potential
d. all of the above - correct answer d. all of the above
Why does the stimulus intensity affect the amount of neurotransmitter release
at the axon terminal? - correct answer the stimulus intensity directly affects
the amount of calcium entering the axon terminal and the stimulus intensity
, proportionally affects the number of synaptic vesicles that discharge their
contents into the synaptic cleft
Predict Question 1:
You have just observed that each action potential in a burst can trigger
additional neurotransmitter release. If calcium ions are removed from the
extracellular solution, what will happen to neurotransmitter release at the axon
terminal? - correct answer There will be more neurotransmitter release.
Why is there NO neurotransmitter release from the axon terminal when there
are no calcium ions in the extracellular solution? - correct answer Exocytosis
of the synaptic vesicles is calcium dependent
Predict Question 2:
What will happen to neurotransmitter release when low amounts of calcium
are added back to the extracellular solution? - correct answer
Neurotransmitter release will increase a small amount
What will happen to neurotransmitter release when Magnesium is added to
the extracellular solution? - correct answer There will be no neurotransmitter
release
Why did the high intensity stimulation fail to trigger the same amount of
neurotransmitter release in the presence of extracellular Mg2+ as in the
control extracellular solution? - correct answer Mg2+ blocks the calcium
channels in the axon terminal
How is the neurotransmitter stored in the axon terminal before it is released? -
correct answer contained in synaptic vesicles
