Hole's Essentials of Human Anatomy & Physiology, 10th Edition (Shier)

Chapter 9: Nervous System

Chemical Synapse

View the animation below, then complete the quiz to test your knowledge of the concept.



1.

An action potential arriving at the presynaptic terminal causes...
A)voltage-gated sodium ion channels to open, and sodium ions to diffuse into the cell.
B)voltage-gated sodium ion channels to open, and sodium ions to diffuse out of the cell.
C)voltage-gated calcium ion channels to open, and calcium ions to diffuse into the cell.
D)acetylcholine to diffuse into the cell.
E)ligand-gated sodium channels to open, and sodium ions to diffuse out of the cell.
2.

As a result of question number one...
A)synaptic vessels migrate to the plasma membrane and release acetylcholine.
B)acetylcholine is actively transported from the pre-synaptic neuron.
C)acetylcholine is actively transported to the post synaptic neuron.
D)ligand-gated sodium channels open.
E)sodium ions diffuse into the cell.
3.

Acetylcholine has which effect on the post-synaptic neuron?
A)Ligand gated calcium ion channels open and calcium diffuses in.
B)Ligand gated sodium ion channels open and sodium diffuses in.
C)Terminal vessels migrate to the plasma membrane.
D)Voltage gated calcium ion channels open and calcium diffuses in.
E)Voltage gated sodium ion channels open and sodium diffuses in.
4.

If the post-synaptic membrane potential reaches threshold level, an action potential will be produced.
A)True
B)False
5.

Acetylcholine is actively transported from the pre-synaptic membrane to the post-synaptic membrane.
A)True
B)False
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