Exam (elaborations)
Week 6 | Physio Ex Simulation - Activity 3: The Action Potential Threshold
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Week 6 | Physio Ex Simulation - Activity 3: The Action Potential Threshold
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Week 6 | Physio Ex Simulation - Activity3: The Action Potential Threshold
Axons are
a. conductors of chemical signals, called graded potentials
b. bundles of nerves
c. the sites of graded receptor potentials in sensory neurons
d. long, thin structures that extend from a neuronal cell body
- Correct Answer ✅ d. long, thin structures that extend
from a neuronal cell body
Which of the following is easier?
a. extracellular recordings of the action potential
b. intracellular recordings of the action potential
c. intracellular and extracellular recordings of the action
potential are equally difficult - Correct Answer ✅ c.
extracellular recordings of the action potential
An action potential is usually initiated in an axon at or near
a. the axon hillock
, Week 6 | Physio Ex Simulation - Activity
3: The Action Potential Threshold
b. the initial segment
c. the trigger zone
d. all of the above - Correct Answer ✅ d. all of the above
The initiation of an action potential in a sensory neuron in the
body normally,
a. follows a sufficiently large depolarizing receptor potential
b. occurs when the membrane potential of the axon hillock
reaches -70 mV
c. requires a nerve chamber
d. occurs in the dendrites - Correct Answer ✅ a. follows a
sufficiently large depolarizing receptor potential
Why is the action potential recorded by the second recording
electrode (R2) delayed relative to the action potential
recorded by the first recording electrode (R1)?
a. the stimulus strength was too small for a simultaneous
recording to occur
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