Synaptic Transmission
Multiple Choice
1. Which structure can be found exclusively at an electrical synapse?
a. Synaptic cleft
b. Synaptic vesicle
c. Connexon
d. Neurotransmitter receptor
e. Presynaptic membrane
Answer: c
Textbook Reference: Two Classes of Synapses
2. Presynaptic and postsynaptic neurons that form _______ synapses are connected via _______.
a. chemical; connexons
b. chemical; neurotransmitter release
c. electrical; gap junctions
d. electrical; the synaptic cleft
e. electrical; synaptic vesicles
Answer: c
Textbook Reference: Two Classes of Synapses
3. How many connexin subunits form one complete synaptic channel?
a. 4
b. 6
c. 10
d. 12
e. 16
Answer: d
Textbook Reference: Signaling Transmission at Electrical Synapses
, 4. Which substances diffuse through connexon channels between pre- and postsynaptic neurons?
a. Ions
b. Second messengers
c. Small proteins
d. ATP
e. All of the above
Answer: e
Textbook Reference: Signaling Transmission at Electrical Synapses
5. Which feature of an electrical synapse allows synchronizing the electrical activity of multiple
neurons?
a. Fast speed of transmission
b. Ability of neurons to form gap junctions with glial cells
c. Bidirectional transmission of electrical signals
d. Slow transmission of signals
e. Bidirectional transmission of chemical signals
Answer: c
Textbook Reference: Signaling Transmission at Electrical Synapses
6. What is the action of the neurotransmitter at a chemical synapse?
a. It acts on receptors in the postsynaptic membrane.
b. It electrically activates the presynaptic neuron.
c. It crosses the postsynaptic membrane and then activates ion channels in the postsynaptic neuron.
d. It depolarizes the postsynaptic membrane by delivering an electrical charge.
e. It transfers an action potential from the presynaptic neuron to the postsynaptic neuron.
Answer: a
Textbook Reference: Signaling Transmission at Chemical Synapses
Multiple Choice
1. Which structure can be found exclusively at an electrical synapse?
a. Synaptic cleft
b. Synaptic vesicle
c. Connexon
d. Neurotransmitter receptor
e. Presynaptic membrane
Answer: c
Textbook Reference: Two Classes of Synapses
2. Presynaptic and postsynaptic neurons that form _______ synapses are connected via _______.
a. chemical; connexons
b. chemical; neurotransmitter release
c. electrical; gap junctions
d. electrical; the synaptic cleft
e. electrical; synaptic vesicles
Answer: c
Textbook Reference: Two Classes of Synapses
3. How many connexin subunits form one complete synaptic channel?
a. 4
b. 6
c. 10
d. 12
e. 16
Answer: d
Textbook Reference: Signaling Transmission at Electrical Synapses
, 4. Which substances diffuse through connexon channels between pre- and postsynaptic neurons?
a. Ions
b. Second messengers
c. Small proteins
d. ATP
e. All of the above
Answer: e
Textbook Reference: Signaling Transmission at Electrical Synapses
5. Which feature of an electrical synapse allows synchronizing the electrical activity of multiple
neurons?
a. Fast speed of transmission
b. Ability of neurons to form gap junctions with glial cells
c. Bidirectional transmission of electrical signals
d. Slow transmission of signals
e. Bidirectional transmission of chemical signals
Answer: c
Textbook Reference: Signaling Transmission at Electrical Synapses
6. What is the action of the neurotransmitter at a chemical synapse?
a. It acts on receptors in the postsynaptic membrane.
b. It electrically activates the presynaptic neuron.
c. It crosses the postsynaptic membrane and then activates ion channels in the postsynaptic neuron.
d. It depolarizes the postsynaptic membrane by delivering an electrical charge.
e. It transfers an action potential from the presynaptic neuron to the postsynaptic neuron.
Answer: a
Textbook Reference: Signaling Transmission at Chemical Synapses
