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ASU BIO 181 EXAM 3 | COMPLETE QUESTIONS & ANSWERS |
ACCURATE ACTUAL EXAM WITH FREQUENTLY TESTED
STUDY GUIDE | EXPERT VERIFIED FOR GUARANTEED PASS
– GRADED A+
List the 4 types of glial cells and list a phrase to describe their function. -
ANSWER-1. Schwann cells wrap around the axon of a cell in the PNS,
while providing electrical insulation.
2. Oligodendrocytes do the same thing as Schwann cells but they do it in
the CNS.
3. Astrocytes protect the brain from toxic chemicals.
4. Microgilia protect the brain.
T/F When the presynaptic cells contacts a muscle cell, the synapse area is
called a motor end plate. - ANSWER-True
T/F The autonomic nervous system contains the sympathetic and the
parasympathetic nervous system. - ANSWER-True
T/F Voltage-gated ion channels open when a protein binds to the receptor.
- ANSWER-False
T/F The receptors in post-synaptic cells are the basis on which the synapse
can be defined as inhibitory or excitatory. - ANSWER-False
Briefly explain why the action potential flows only from the axon hillock to
the terminal web. - ANSWER-The action potential originates from the axon
hillock which initiates the flow of the action potential because of the
presence of higher density voltage-gated ion channels.
T/F Fast neurons as described in lecture require cytoplasmic signal
transduction to open an ion channel. - ANSWER-False
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T/F Potassium ions are at high concentrations inside of cells including in
neurons. - ANSWER-True
In the motor end plate, the event that is the immediate trigger for exocytosis
is:
- Potassium Ions
- Chloride ions.
- The action potential.
- The cell body. - ANSWER-Calcium ions.
T/F Excitatory synapses make the post-synaptic cell less likely to fire. -
ANSWER-False
T/F Acetylcholine exocytosed from the presynaptic cell travels to the
postsynaptic cell to start the action potential in the postsynaptic cell. -
ANSWER-True
The post-synaptic cell can be:
- in glands, muscle cells, neurons.
- are only neurons.
- have only chemical synapses.
- have only electrical synapses.
- this list contains no correct answers. - ANSWER-in glands, muscle cells,
neurons.
The resting potential of neurons is:
- 0 mV
- same as the action potential.
- always a positive value.
- two of the above.
- the answer is not on this list. - ANSWER-The answer is not on this list
T/F The axon from a pre-synaptic cell contacts the axon of another neuron.
- ANSWER-False
T/F Fast neurons as described in lecture are fast because they are
surrounded by a type of glial cell that results in a myelin coating. -
ANSWER-False
The neural tissues are:
2025/2026
ASU BIO 181 EXAM 3 | COMPLETE QUESTIONS & ANSWERS |
ACCURATE ACTUAL EXAM WITH FREQUENTLY TESTED
STUDY GUIDE | EXPERT VERIFIED FOR GUARANTEED PASS
– GRADED A+
List the 4 types of glial cells and list a phrase to describe their function. -
ANSWER-1. Schwann cells wrap around the axon of a cell in the PNS,
while providing electrical insulation.
2. Oligodendrocytes do the same thing as Schwann cells but they do it in
the CNS.
3. Astrocytes protect the brain from toxic chemicals.
4. Microgilia protect the brain.
T/F When the presynaptic cells contacts a muscle cell, the synapse area is
called a motor end plate. - ANSWER-True
T/F The autonomic nervous system contains the sympathetic and the
parasympathetic nervous system. - ANSWER-True
T/F Voltage-gated ion channels open when a protein binds to the receptor.
- ANSWER-False
T/F The receptors in post-synaptic cells are the basis on which the synapse
can be defined as inhibitory or excitatory. - ANSWER-False
Briefly explain why the action potential flows only from the axon hillock to
the terminal web. - ANSWER-The action potential originates from the axon
hillock which initiates the flow of the action potential because of the
presence of higher density voltage-gated ion channels.
T/F Fast neurons as described in lecture require cytoplasmic signal
transduction to open an ion channel. - ANSWER-False
2025/2026
, 2|Page
T/F Potassium ions are at high concentrations inside of cells including in
neurons. - ANSWER-True
In the motor end plate, the event that is the immediate trigger for exocytosis
is:
- Potassium Ions
- Chloride ions.
- The action potential.
- The cell body. - ANSWER-Calcium ions.
T/F Excitatory synapses make the post-synaptic cell less likely to fire. -
ANSWER-False
T/F Acetylcholine exocytosed from the presynaptic cell travels to the
postsynaptic cell to start the action potential in the postsynaptic cell. -
ANSWER-True
The post-synaptic cell can be:
- in glands, muscle cells, neurons.
- are only neurons.
- have only chemical synapses.
- have only electrical synapses.
- this list contains no correct answers. - ANSWER-in glands, muscle cells,
neurons.
The resting potential of neurons is:
- 0 mV
- same as the action potential.
- always a positive value.
- two of the above.
- the answer is not on this list. - ANSWER-The answer is not on this list
T/F The axon from a pre-synaptic cell contacts the axon of another neuron.
- ANSWER-False
T/F Fast neurons as described in lecture are fast because they are
surrounded by a type of glial cell that results in a myelin coating. -
ANSWER-False
The neural tissues are:
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